I’m Using a 7.5 cm Jar with 8% Vanilla and the Flame Keeps Getting Smaller as the Candle Burns — Should I Test a Larger Wick?
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Vanilla Bean 100 g ₹790.00 · every size in stock Cotton Braided ₹120.00 for 10 · in stock Eco C2 ₹94.40 for 10 · in stock
7.5 cm jar · 8% vanilla · flame shrinking burn after burn
Read the shape of the shrink before you size up the wick.
★★★★★
"One of the best fragrance oils"
AnonymousVerified buyer · Jul 2025
Dark Vanilla Fragrance
★★★★★
"Frangance is sooo good"
Sneha TamangVerified buyer · May 2025
Cinnamon Vanilla
★★★★☆
"Will buy more.. wonderful"
Punam SarmaVerified buyer · Dec 2024
Cinnamon Vanilla
★★★★★
"Quality wick, works very well"
AshwiniSep 2025
Eco Candle Wicks
★★★★★
"Good product"
Biny AbrahamVerified buyer · Feb 2026
Black Glass Jar with Black Lid (150 gram) (Deliveries Starting 5th Dec)
★★★★★
"I love all the products...I received it without any damages...love to reorder again❤️"
Kaushiki SatarkarVerified buyer · Apr 2025
Luxury Soy Wax Chunks for Jar / Container Candles
★★★★★
"One of the best fragrance oils"
AnonymousVerified buyer · Jul 2025
Dark Vanilla Fragrance
★★★★★
"Frangance is sooo good"
Sneha TamangVerified buyer · May 2025
Cinnamon Vanilla
★★★★☆
"Will buy more.. wonderful"
Punam SarmaVerified buyer · Dec 2024
Cinnamon Vanilla
★★★★★
"Quality wick, works very well"
AshwiniSep 2025
Eco Candle Wicks
★★★★★
"Good product"
Biny AbrahamVerified buyer · Feb 2026
Black Glass Jar with Black Lid (150 gram) (Deliveries Starting 5th Dec)
★★★★★
"I love all the products...I received it without any damages...love to reorder again❤️"
Kaushiki SatarkarVerified buyer · Apr 2025
Luxury Soy Wax Chunks for Jar / Container Candles
Reviews collected and published through Judge.me on candlemakingsuppliesindia.store. They are general reviews of the products named on each card, not assessments of the advice set out below. Wording is unedited.
✓ Prices verified 29 September 2026, stock checked per size ✓ MSDS and IFRA documentation on request on WhatsApp ✓ Raw materials only — CSI does not sell finished candles
CSI Wick Lab · 7.5 cm Jars
A vanilla flame that gets smaller every session is either a slope or a step. Plot one trimmed flame reading per session: a steady slope earns a one-rung-up test through the whole candle; a late step earns a look at the tab zone first.
1 reading
per session, at one hour, trimmed, with the wax depth · CSI live pricing, September 2026
Quick answers — read this first
My 7.5 cm candle with 8% vanilla has a flame that keeps getting smaller as it burns down. Should I test a larger wick? Possibly, but only once you know the shape of the shrink. Measure the trimmed flame height at one hour into every session and plot it against the session number. A steady fall at every depth points to a wick that is clogging: test one rung up. A flat line that drops suddenly low in the jar points to the tab zone: check that first.How do I measure it? Trim to about 5–6 mm before each session, light, and at 60 minutes photograph the flame beside a ruler held behind the jar. Note the wax depth. One number per session, every session, to about 1 cm left.
What does "one rung up" mean at CSI? From Eco C2, the next sized rung is Cotton Braided Wicks, a cotton wick as the Vanilla Bean page suggests, described by its own page for candles "exceeding 8 cm". Test it against your C2, three candles each, through the whole candle.
What does the pair cost? Six 150 g candles at 8%: 72 g of Vanilla Bean, 828 g of CSI 464, three C2 and three Cotton Braided: ₹1,053.25 of materials, your jars aside.
The short answer
The curve: trimmed flame height at 1 h of each session against session number, with wax depth. One reading per session, through the whole candle.
The patterns (judgement): falling three or more sessions running and 25% or more below session 1 = steady shrink, commonly clogging → one rung up. Flat, then one drop of about 30% or more low in the jar = tab zone → check it first. Flat = not a wick-size problem.
The test: current C2 against Cotton Braided, three candles each, same wax, oil, load, jar, fill and room, burned to about 1 cm left; the arm whose curve stays flat and whose lower third stays calm wins.
The honest part: vanilla is a common suspect but CSI has no wick data for it; and a flame that shrinks within one session, or recovers after trimming, is a different question with its own post.
In this guide
- Straight answer: a larger wick or not?
- A flame that shrinks from one session to the next
- Drawing the flame-shrink curve: one reading per session
- Three shapes the curve takes, and what each points to
- Why vanilla is a usual suspect, and what its page says
- Current wick against one rung up, through the whole candle
- What the pair needs
- Frequently asked questions
Two worked-example candles, one side view per session at true scale. In A the flame is a little smaller every time, at every wax depth: the signature commonly linked to a wick that is gradually clogging. In B the flame holds for five sessions and collapses once the wax is low: the signature of the tab or sticker zone. Same question, different answers. The 4 cm pour depth and 8.5 cm jar height are assumptions for drawing; the flame heights are illustrative, not CSI data.
One rung up · Cotton Braided · ₹120.00 for 10
Cotton Braided Wicks: the test arm if your curve falls steadily
The oil in the question · 100 g ₹790.00 · every size in stock
Vanilla Bean Fragrance Oil: the 100 g covers a six-candle pair
WhatsApp +91 7397976926
Send us your curve and we will read the shape with you
Straight answer
I'm using a 7.5 cm jar with 8% vanilla and the flame keeps getting smaller as the candle burns. Should I test a larger wick?
Test one, yes, if the shrink is steady; but read its shape first, because two very different faults both look like "the flame is getting smaller". Trim to about 5–6 mm before every session and record the flame height at one hour, with the wax depth, until the candle is down to about 1 cm. If the flame falls a little every session at every depth (in our worked example 0.3 cm a session, 53% down by session 7), the wick is commonly being starved as it clogs, and heavy, vanillin-rich oils like vanilla are a usual suspect: run your current C2 against one rung up, Cotton Braided, three candles each, through the full life. If the flame holds steady and then drops sharply once the wax is low, suspect the tab or sticker zone and check it before buying a bigger wick. If the flame is flat from session to session but shrinks within a session, or recovers when you trim it, that is not a wick-size curve at all. Do not change the load to fix it; 8% is inside Vanilla Bean's stated "Up to 10% for soy wax".
One line: one flame reading per session turns "it keeps getting smaller" into a slope or a step, and only the slope earns a bigger wick.
Only if your curve falls steadily: the one-up arm needs Cotton Braided Wicks, 10 for ₹120.00, and a fresh Vanilla Bean 100 g (₹790.00) for six candles. If the curve is a step or a flat line, buy nothing yet.
Cotton Braided — ₹120.00 for 10
A flame that shrinks from one session to the next
"Smaller every time" is a trend across sessions. Measure it across sessions, not within one.
Three different things get called a shrinking flame, and they have different causes and different posts. Within one session, a flame that starts tall and fades after a couple of hours is a session-clock question (the session-clock log). After carbon builds, a flame that is small until you trim it and then recovers is the trim-recovery question (the flame-weakens-halfway post). From session to session, a flame that is a little smaller at the same point of every burn, however carefully you trim, is the question this page owns. It is the one most likely to need a different wick, and the one people most often misdiagnose from memory.
Why it happens is commonly explained in two ways. A wick draws melted wax and oil up by capillary action; if some of what it draws does not burn cleanly, residue can build in the wick and slowly reduce what reaches the flame. That is "clogging", and heavier or vanillin-rich oils are often linked to it (a tendency, not CSI data). Or, low in the jar, something physical changes: the wick reaches its metal tab or a sticker, the pool gets deep for the wick's draw, or debris collects. The first gives a slope; the second gives a step. Your curve tells you which.
Your jar first
A 7.5 cm jar has about 44.18 cm² of pool if 7.5 cm is the inside, less if it is the outside (6.8 cm inside on a 0.35 cm wall, our assumption). CSI has no in-stock 7.5 cm jar; measure your own inside at the rim, middle and base, as the 7.5 cm hub describes, and pour every test candle in jars from one batch. A rough rule of thumb puts a full first pool at about 3.0 hours for this width.Drawing the flame-shrink curve: one reading per session
Seven numbers, one per session. That is the whole instrument.
1
Fix the ruler, not your eyeStand a steel ruler upright behind the jar, not touching it, at the same distance every time, and photograph from the same spot at wick height. Read the flame from where it leaves the wick to its visible tip, in millimetres. Never touch the glass.
2
Trim to the same length before every sessionAbout 5–6 mm; a cutter long enough to reach down the jar keeps the cut square. A curve made from untrimmed wicks measures your trimming, not the wick.
3
Read at 60 minutesThe first minutes of a session are the wick relighting; by an hour the flame has settled. One reading, at the same minute every session. Add a note if it flickers (a draught spoils the reading; relight in still air).
4
Record the wax depth and the gramsBefore lighting, dip a marked skewer beside the wall (away from the wick) for depth, or weigh the candle. Grams burned per hour after session 1 tell you how many sessions the candle has; for example, a 150 g candle weighing 128 g after a 3-hour first session is burning about 7 g an hour. The full-life planning method is the full-life calendar.
5
Same session, same room, every timeAbout 3 hours, full cool-down between sessions, fan and AC off. Burn within sight. Stop the candle with about 1 cm of wax left.
6
Plot itSession number along the bottom, flame height up the side, wax depth written under each point. Two candles from the same pour give you two curves; if they disagree, the disagreement is the answer (a pour or wick-lot issue), not the average.
Worked-example curves · 7.5 cm inside · Vanilla Bean 8% · 150 g CSI 464 · C2
Trimmed flame height at 1 h, cm · wax depth at the start of the session, cm (4 cm at pour, assumed) · illustrative, not CSI data
| Session | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|
| Wax depth | 4.0 | 3.6 | 3.2 | 2.8 | 2.4 | 2.0 | 1.6 |
| A · steady shrink | 3.4 | 3.1 | 2.8 | 2.5 | 2.2 | 1.9 | 1.6 |
| B · flat, then a step | 3.3 | 3.2 | 3.3 | 3.2 | 3.1 | 1.6 | 0.9 |
| C · flat | 3.3 | 3.2 | 3.3 | 3.4 | 3.3 | 3.4 | 3.5 |
A and B both end with a small flame, and a maker who only looks at session 7 would call them the same fault. They are not. A is 0.3 cm smaller every session from the very top of the candle. B moves only 0.2 cm over five sessions and then loses 48% of its height in one. C is steady within the 2.5–5 cm practical range many makers use (rule of thumb).
Three shapes the curve takes, and what each points to
A slope is a wick question. A step is a depth question. A flat line is somebody else's question.
Decision table · reading the curve (our judgement, labelled)
Thresholds chosen so they can be read off a photo · set yours before you burn and keep them
| Shape | How to recognise it | Commonly linked to | Next step | Purchase |
|---|---|---|---|---|
| A · Steady shrink | Falls three or more sessions in a row and ends 25% or more below session 1 (in the example, below 2.5 cm from S5 on), at every depth | Wick gradually starved: clogging from a heavy or vanillin-rich oil, or a wick at the small end for this jar | Current v one rung up through the full life (below) | Cotton Braided 10, ₹120.00 |
| B · Flat, then a step | Steady within a few mm for several sessions, then one drop of about 30% or more, low in the jar | Tab or sticker zone, a pool deep for the wick's draw, debris, a narrowing base | Record the wax height at the drop and compare with the tab height (the late-drowning post) | Nothing yet |
| C · Flat | Within a few mm every session | Your "shrinking" is within a session or untrimmed | The session clock (session-clock log) or the trim-recovery test (trim-recovery post) | Nothing |
| A, but only after session 1 of a long burn | The fall starts after a 4–5 h first session | Carbon from over-long sessions, not the wick size | Repeat on a twin with 3 h sessions | Nothing |
| Two twins disagree | One A, one C | Pour, wick lot or centring differs | Pour a third; check centring and the wick lot | Nothing yet |
Mistake: sizing up on a step. What happens: a bigger wick makes the first five sessions hotter to fix the last two, and the tab-zone cause is still there. A bigger flame at the top of a 7.5 cm candle also means a hotter lower third later. Fix: when the curve steps, note the wax height at the drop; if it matches the height of the tab and any sticker, the cure is in how the wick is anchored and how low you let customers burn, not in the wick size. Stop every test candle with about 1 cm left.
Mistake: raising the load to "feed" a shrinking flame. Why it backfires: the common tendency is the opposite: a higher load can make a flame smaller or sootier and is often linked to more residue. Vanilla Bean at 8% is inside its stated "Up to 10% for soy wax" and CSI 464's "up to 10%"; leave it. Whether less oil would help instead is a different test (the load step-down).
Why vanilla is a usual suspect, and what its page says
Vanilla is a suspect, not a verdict. The page tells you what to watch; your curve tells you what happened.
Vanilla-rich oils turn up again and again in makers' notes about wicks that need changing, and the reasons usually given are their weight and their vanillin content (tendencies; CSI publishes no wick data for any oil). The Vanilla Bean Fragrance Oil page gives you three relevant lines, quoted as written:
Vanilla Bean · page statements that bear on this test
Quoted from the product page, 29 September 2026
| Page line | What it means for the curve |
|---|---|
| "Vanillin Content: 2.5% (Potential discoloration; test with lighter waxes or consider adding color stabilizers)" | A reason to expect this oil to behave differently from a light floral; also a colour note. CSI does not currently list a colour stabiliser. |
| "Wick Recommendations: Cotton or wooden wicks for a steady and even burn. Wick testing is recommended based on your container size and wax type." | No size is named. Cotton Braided is a cotton rung; the one wooden-wick listing is a different wick system, not a step. |
| "Recommended Fragrance Load: Up to 10% for soy wax"; "Cure Time: 48–72 hours for soy wax" | 8% is inside the range; cure the test candles at least that long, and the same for both arms. |
If you are choosing a vanilla rather than fixing one, the lever of swapping to a different vanilla oil is the 6.5 cm vanilla swap. CSI's Dark Vanilla Fragrance is priced identically to Vanilla Bean at every size and says "Vanillin present - note for light-coloured wax"; it is not a cleaner-burning substitute on any data we have, just a different vanilla.
Argued against our own interest: Performance Wooden Wicks (₹590.00 for 10, ₹59.00 each, ₹47.00 more per wick than Cotton Braided) fit the page's "wooden wicks" line, but CSI lists one wooden wick with no widths to step between. If it burns too hot or too cold in your jar there is nowhere to go. Test it as a separate, labelled arm only if you want the wooden-wick look; do not buy it as "one size up".
Current wick against one rung up, through the whole candle
The bigger wick will fix the top. The only question worth paying for is what it does at the bottom.
When the curve is a steady shrink, the test is a pair: your current wick (C2 in the worked example) against one rung up (Cotton Braided), three candles each. Hold everything else: Vanilla Bean at 8% of total weight, one bag of CSI 464, one jar batch, 150 g fill (12 g oil + 138 g wax), the same pour temperature (CSI 464 states 80–90°C; pour at the low end if your jar states no heat figure, and pre-warm clean jars; our judgement), the same cure and the same room. Log the flame-shrink curve for all six, plus pool coverage and depth.
Bill of materials · the pair · worked example
C2 v Cotton Braided · 3 candles each · 150 g at 8% · your own 7.5 cm jars · CSI live pricing, 29 September 2026
| Item | Size bought | Used | Cost of what is used |
|---|---|---|---|
| Vanilla Bean Fragrance Oil | 100 g, ₹790.00 (₹7.90/g) | 72 g (12 g × 6; 28 g left) | ₹568.80 |
| Luxury Soy Wax CSI 464 | 1 kg, ₹507.40 | 828 g (138 g × 6; 172 g left) | ₹420.13 |
| Eco Candle Wicks, Thick (C2) | 10, ₹94.40 | 3 | ₹28.32 |
| Cotton Braided Wicks Ready Made | 10, ₹120.00 | 3 | ₹36.00 |
| Pair, oil, wax and wicks consumed | 6 candles | ₹1,053.25 |
Per candle, before your jar, that is ₹174.26 on C2 and ₹176.82 on Cotton Braided; the bigger wick adds ₹2.56. Vanilla is the expensive line: ₹94.80 of oil per candle at the 100 g price, ₹91.75 at the 1 kg price. Argued against our own interest: the 1 kg is only ₹0.25 a gram cheaper than the 100 g, so there is no case for it until a wick has passed. From nothing, the cash outlay is ₹1,511.80; if you already hold C2 wicks, ₹1,417.40. Costs exclude labour, freight, packaging, jars and GST. Already have one candle with a curve? A single twin to confirm it costs ₹174.26; two cost ₹348.52.
Pair decision · after the full life (our judgement, labelled)
"Holds" = at least 2 of 3 candles keep a flat curve (no fall of 25% or more) with a calm lower third: flame in the practical range, no mushrooming run, no flame near the glass
| C2 arm | Cotton Braided arm | Decision |
|---|---|---|
| Shrinks again | Holds | Cotton Braided for this vanilla in this jar |
| Shrinks again | Holds at the top, runs hot in the lower third | The answer sits between the two; CSI lists no sized wick there. Consider a lower load within range, ask us, or another supplier's intermediate size |
| Holds (the first curve was a one-off) | Holds, but hotter throughout | Keep C2; find what differed in the first candle |
| Shrinks | Shrinks too | Not a size problem alone: residue, trimming or oil; revisit the load or the oil before a double wick |
Why the full life and not just the curve? Because a bigger wick commonly makes the top sessions look better and the bottom sessions hotter, and in a 7.5 cm jar the lower third is where that shows. The acceptance gates, what to record at halfway and at the final third, are the depth-gate post. If Cotton Braided holds the curve and your jar is 8 cm, the same comparison through the whole candle is the 8 cm vanilla one-up post.
What the pair needs
Five items, chosen on page statements, price and stock on 29 September 2026. CSI publishes no wick-performance data, so nothing here is ranked on burn results. Candle counts use 150 g at 8% (12 g of oil).
1
fragrance oil · gourmand · the oil in the question
Vanilla Bean Fragrance Oil
The page describes a "Single note" of "Creamy, sweet vanilla with subtle caramel undertones", states "Up to 10% for soy wax", "Cure Time: 48–72 hours for soy wax" and "Vanillin Content: 2.5% (Potential discoloration; test with lighter waxes or consider adding color stabilizers)"; CSI does not currently list a colour stabiliser. Its wick line is "Cotton or wooden wicks for a steady and even burn. Wick testing is recommended based on your container size and wax type." At 8% you are inside both ceilings. Every size is in stock on 29 September 2026. The 100 g covers the six-candle pair (72 g) with 28 g left; a 50 g falls 22 g short.
| Size | Price | Per gram | 150 g candles at 8% |
|---|---|---|---|
| 15 g | ₹130.00 | ₹8.67 | 1 |
| 50 g | ₹410.00 | ₹8.20 | 4 |
| 100 g | ₹790.00 | ₹7.90 | 8 |
| 500 g | ₹3,840.00 | ₹7.68 | 41 |
| 1 kg | ₹7,646.00 | ₹7.65 | 83 |
One 150 g candle at 8%: 12 g = ₹94.80. Buy 100 g — ₹790.00
2
wick · the one-rung-up arm
Cotton Braided Wicks Ready Made (pack of 10)
CSI's next sized rung above C2, and a cotton wick, which is what the Vanilla Bean page names. Its own page says "engineered for large-diameter candles exceeding 8 cm" and claims it helps in "preventing tunneling"; at 7.5 cm you are just under that wording, so it is a labelled test arm, not a match. "Height of the wick is 10.16 cm": cut it down after the wax sets. ₹12.00 a wick in every pack. Argued against our own interest: buy the 10-pack, not the 50: the price per wick is identical, and if the pair says C2 was right all along you will not need the rest.
| Pack | Price | Per unit | What it covers here |
|---|---|---|---|
| Pack of 10 | ₹120.00 | ₹12.00 | the one-up arm (3), 7 spare for a retest |
| Pack of 50 · 100 | ₹600.00 · ₹1,200.00 | ₹12.00 | same per wick; only after full life |
| Pack of 500 · 1000 | ₹6,000.00 · ₹12,000.00 | ₹12.00 | production |
Three wicks: ₹36.00. Buy 10 — ₹120.00
3
wick · the current wick, as the control
Eco Candle Wicks — Thick (C2)
The worked example assumes you are on C2. The page states no size or jar range in the text we captured. If your existing C2 wicks are from an old lot, a fresh 10-pack keeps both arms on current stock. Stock on 29 September 2026: every C2 pack is in stock; the C1 10-pack is out of stock (C1 plays no part here). Per-wick price is flat at every pack size.
| Pack | Price | Per unit | What it covers here |
|---|---|---|---|
| Thick (C2) / 10 | ₹94.40 | ₹9.44 | the control arm (3), if you need fresh wicks from one lot |
| Thick (C2) / 20 · 50 · 100 · 500 · 1000 | ₹188.80 · ₹472.00 · ₹944.00 · ₹4,720.00 · ₹9,440.00 | ₹9.44 | production |
| Thin (C1) / 10 | ₹59.00 — Out of stock | ₹5.90 | Out of stock on 29 September 2026 |
| Thin (C1) / 20 and up | from ₹118.00 | ₹5.90 | not needed here: a shrinking flame is not a C1 question |
Three control wicks: ₹28.32. Buy C2 10 — ₹94.40
4
wax · the soy in the worked example
Luxury Soy Wax CSI 464 (Flakes Form) For Container Candles
"Fragrance Load Up to 10%" and "Pour Temperature 80°C – 90°C" on the page. One bag for both arms: a curve that changes because the wax changed is useless. Flat at ₹0.51 a gram from 1 kg to 10 kg.
| Pack | Price | Per unit | What it covers here |
|---|---|---|---|
| 500 g | ₹260.00 | ₹0.52 per g | three of the six candles |
| 1 kg | ₹507.40 | ₹0.51 per g | all six (828 g), 172 g left |
| 5 kg · 10 kg | ₹2,537.00 · ₹5,074.00 | ₹0.51 per g | flat per gram; production only |
Six candles: 828 g = ₹420.13. Buy 1 kg — ₹507.40
5
tool · the trim that makes the curve comparable
Candle Wick Cutter | Candle Wick Trimmer (5.5 cm blade)
The curve only means something if every session starts from the same trimmed length. This cutter's page gives "Total Size: 11 cm" and "Blade Size: 5.5 cm", the longer blade of CSI's two Candle Wick Cutter listings (the other is 3 cm), which helps when the wick sits deep in the jar near the end of the candle, where this test is decided. Argued against our own interest: any sharp scissors that reach the wick without tilting the jar will do.
| Pack | Price | Per unit | What it covers here |
|---|---|---|---|
| Single | ₹295.00 | ₹295.00 | one cut to 5–6 mm before every session, every candle |
One tool for the whole test. Buy — ₹295.00
Diwali is 8 November 2026, 40 days from 29 September 2026. A full-life pair in a 7.5 cm jar takes about seven 3-hour sessions per candle after cure; poured this week, it can finish by mid-to-late October if you burn most days, leaving time to settle the wick before a festive pour. Send us your candle count for a quote on Vanilla Bean, Cotton Braided, C2 and CSI 464 with a GST invoice and dispatch date.
WhatsApp a Diwali quote
The CSI principle
A slope earns a bigger wick; a step earns a look at the tab.
Record one trimmed flame height per session, with the wax depth. Only a flame that shrinks steadily at every depth justifies testing one rung up, and only a full-life pair decides it.
"Seven flame readings will tell you more about your wick than seven opinions."
— CandleMakingSuppliesIndia
Why trust this guide
CandleMakingSuppliesIndia sells the oil, wicks and wax named here, and does not sell finished candles. This page still says that two of the three curve shapes need no new wick, that our 1 kg vanilla barely saves per gram, and that our wooden wick has no size to step to.
Every price was verified on CSI's live store on 29 September 2026. Stock was checked per size: the Eco C1 10-pack is out of stock on that date and is flagged; every other size shown is in stock. Vanilla Bean's load, vanillin, cure and wick wording and every wick and wax figure are quoted from the product pages.
The curve thresholds, the 4 cm pour depth, the 8.5 cm jar height, the 150 g fill and all flame readings are our judgement or worked examples; clogging, tab-zone and vanilla tendencies are commonly reported, not CSI data; CSI publishes no wick-performance data. For bulk pricing, GST invoicing, and MSDS and IFRA documentation on request, message us on WhatsApp at +91 7397976926.
Frequently asked questions
Why does my candle flame get smaller every time I light it?
Commonly because the wick is slowly clogging, especially with heavier or vanillin-rich oils, or because the wax has reached the tab or sticker zone near the bottom. Record the trimmed flame height at one hour each session: a steady fall suggests clogging, a sudden late drop suggests the tab zone.
Do vanilla candles need a bigger wick?
Often, but not always: vanilla-rich oils are commonly linked to wick changes, and CSI has no measured wick data for them. Test your current wick against one size up, three candles each, through the whole candle before you switch.
How do I measure candle flame height?
Trim to about 5–6 mm, light, and at one hour photograph the flame beside an upright ruler held behind the jar at a fixed distance. Measure from the wick to the visible tip. Many makers treat about 2.5–5 cm as a practical range.
What wick is recommended for Vanilla Bean fragrance oil?
The page says "Cotton or wooden wicks for a steady and even burn. Wick testing is recommended based on your container size and wax type." It names no size. With CSI wicks, bracket Eco C2 against Cotton Braided in your jar.
My flame drowns only near the bottom of the jar. Is my wick too small?
Not necessarily. A flame that was steady for most of the candle and fails low down points first to the tab or sticker zone, a deep pool or debris. Note the wax height when it starts and compare it with the tab height before changing the wick.
Should I add more fragrance if the flame is getting weaker?
No. A higher load commonly makes a flame smaller or sootier, not stronger. Vanilla Bean at 8% is inside its stated "Up to 10% for soy wax"; leave the load and read the curve.
Before you buy a bigger wick for vanilla
Plot one flame reading per session; a steady slope earns a C2 v Cotton Braided pair.
Trim, light, read at one hour, note the depth, every session to about 1 cm left. Steady shrink: six candles, three each on C2 and Cotton Braided, ₹1,053.25 of materials. A late step: check the tab zone first. Flat: not a wick-size problem. Send us your curve on WhatsApp.
Shop Cotton Braided Wicks Send your curve on WhatsApp
Continue the read — 7.5–8 cm jars, single wick
- I’m Using a 7.5 cm Jar with Soy Wax and 8% Lavender Fragrance — The Candle Tunnels for Two Burns but Eventually Catches Up; Should I Change the Wick?
- I’m Using an 8 cm Jar with Soy Wax and 8% Vanilla Fragrance — The Candle Tunnels Initially but Reaches a Full Melt Pool on the Third Burn; Should I Actually Increase the Wick?
- My 7.5 cm Jar Works Perfectly with Lavender but the Same Wick Mushrooms Badly with Oud at 10% — Why Does Changing Only the Fragrance Alter the Burn?
- My 7.5 cm Coffee Candle Gives Excellent Hot Throw but Produces Soot After Three Hours — How Do I Keep the Fragrance Performance While Correcting Combustion?
- I’m Using a 7.5 cm Jar with 10% Rose Fragrance and the Melt Pool Becomes Very Deep — Should I Reduce Fragrance Load or Wick Size First?
- My 7.5 cm Soy Candle Has a 1 cm Deep Melt Pool After Four Hours — How Do I Determine Whether the Wick Is Generating Too Much Heat?
- I’m Using a 6.5 cm Jar with Soy Wax and 10% Vanilla Fragrance — Why Does the Wick Mushroom Even Though the Same Wick Burns Cleanly with Lavender?
- I’m Using a 6.5 cm Glass Jar with Soy Wax and 8% Oud Fragrance — Why Does the Wick Struggle After the Candle Has Been Burning for Several Hours?
Editorial standards & sources
About this guide: part of CSI's cluster on 7.5–8 cm jars with a single wick (4221–4240). It owns one method: the flame-shrink curve (trimmed flame height at one hour of each session, with wax depth) and its three shapes, followed by a current v one-rung-up pair through the full life, for an 8% vanilla candle in a 7.5 cm jar.Customer reviews: The six reviews at the top of this page are genuine, published Judge.me reviews left by CSI customers on the product pages named on each card — Black Glass Jar with Black Lid (150 gram) (Deliveries Starting 5th Dec), Cinnamon Vanilla, Dark Vanilla Fragrance, Eco Candle Wicks, Luxury Soy Wax Chunks for Jar / Container Candles. They are general product reviews, not assessments of the wick advice on this page. Names, star ratings, dates and products are as recorded by Judge.me and wording is unedited. "Verified buyer" appears only on reviews Judge.me recorded as verified — Anonymous, Sneha Tamang, Punam Sarma, Biny Abraham, Kaushiki Satarkar. The reviews from Ashwini are published but not recorded as verified, and carry no badge. Reviews below five stars are included as published, not filtered out.
Figures verified 29 September 2026, CSI live pricing: Vanilla Bean Fragrance Oil 15 g ₹130.00 (₹8.67/g), 50 g ₹410.00 (₹8.20/g), 100 g ₹790.00 (₹7.90/g), 500 g ₹3,840.00 (₹7.68/g), 1 kg ₹7,646.00 (₹7.65/g); Dark Vanilla Fragrance the same at every size; Cotton Braided Wicks Ready Made 10 ₹120.00, 50 ₹600.00, 100 ₹1,200.00, 500 ₹6,000.00, 1,000 ₹12,000.00; Eco Candle Wicks Thick (C2) 10 ₹94.40, 20 ₹188.80, 50 ₹472.00, 100 ₹944.00, 500 ₹4,720.00, 1,000 ₹9,440.00; Thin (C1) 10 ₹59.00 (out of stock), 20 ₹118.00; Performance Wooden Wicks 10 ₹590.00; Luxury Soy Wax CSI 464 500 g ₹260.00, 1 kg ₹507.40, 5 kg ₹2,537.00, 10 kg ₹5,074.00; Candle Wick Cutter (5.5 cm blade) ₹295.00. Every other size listed is in stock on 29 September 2026. Per unit = price ÷ grams or units, two decimals.
Non-price figures: load is a percentage of total candle weight (150 g at 8% = 12 g oil + 138 g wax). The 7.5 cm inside reading, 150 g fill, 4 cm pour depth, 8.5 cm jar height and C2 house wick are worked-example assumptions. Ceilings as the pages state (Vanilla Bean up to 10% in soy, CSI 464 up to 10%, pour 80–90°C): formulation limits, not regulatory ones. Flame-height range (about 2.5–5 cm), trim length (about 5–6 mm) and melt-pool times are commonly cited rules of thumb. Curve shapes, thresholds and the pair rule are editorial judgement; all readings are illustrative. Costs exclude labour, freight, packaging, jars and GST. Diwali 8 November 2026 is a calendar fact.