I’m Ordering Sample Wicks for a New 8 cm Jar — How Many Sizes Around the Expected Starting Point Should I Buy?

The breadth rule: expected centre, one rung each side

You buy sample wicks to find the one that passes, but you can only trust a pass when the sizes next to it fail in the expected direction: the smaller one too cool (a ring at the glass), the larger too hot (tall flame, carbon, a deep pool). That flanking is what closes a bracket; the rule itself, and why 7 cm makers end up buying every rung, is the bracket-closure post. Its purchasing consequence for sample breadth is simple: the minimum is three sizes, wrapped around where you expect the answer to be.

Why not two? Two sizes can tell you which of the two is better; they cannot tell you whether a third would be better still. If you buy C2 and Cotton Braided and both pass, you do not know whether C2 is the smallest that works; if both fail low, you do not know how far off you are. A three-size order answers in one round of cure and burns what a two-size order can take two rounds to answer. Choosing the first three for a 3-inch jar is covered in the first-three-wicks post; this page is about how far to widen it.

Breadth is not depth. How many candles of each size (three here, the minimum that lets one odd candle be outvoted), and when to add retest or spare candles per size, is the per-size sample-count post. Keep the two decisions separate: widen the ladder only when the centre is uncertain; deepen it only when the results are.

Where your centre sits decides which three

The centre is your best guess at the winning wick, made before you burn anything, from three inputs: the inside diameter, the wax and the oil. For an 8 cm inside diameter the pool is 50.27 cm² for one wick (25.13 cm² each for two): large enough that Cotton Braided's page line, "engineered for large-diameter candles exceeding 8 cm", puts your jar right on its boundary. A very rough rule of thumb (about an hour of burning per 2.5 cm of width) gives about 3.2 hours to a full first pool, inside the commonly quoted 3–4 hours.

The oil moves the centre. Heavier, vanillin-rich or resinous oils (vanilla, coffee, oud, some gourmands) are commonly linked to needing a larger wick than light florals and herbals in the same jar: a tendency, not a rule, and CSI publishes no wick data for any oil. So the same jar gets different windows:

The heavy-oil row drops C1 single, which surprises people. It is two rungs below the expected centre: if Cotton Braided wins, C2 is the documented fail below it, and C1 adds a fail you could have predicted. Three candles you do not pour are about ₹537.78 you do not spend. The worked 8 cm vanilla order, with its own bill and approval gates, is the cluster hub; the information to collect before choosing the centre at all (inside diameter at three heights, fill, wax, oil notes, intended burn length) is the pre-order spec sheet.

The size-breadth table: what each extra size adds

Here is every option on CSI's list for an 8 cm sample order, with what it adds. Materials per arm are three 200 g candles at 8% (16 g Japanese Cherry Blossom at the 100 g price, ₹80.00, plus 184 g CSI 464, ₹93.36, plus the wicks): excluding your jars, labour, freight, packaging and GST. The 200 g fill is a labelled worked example.

Rolled up by scenario, the same table gives the size of the whole order. Oil grams are matched to in-stock bottle sizes, with what is left for a re-pour:

Why two 100 g bottles for nine candles, not 100 g + 50 g (₹770.00)? The cheaper pair leaves 6 g, not one candle; two 100 g leave 56 g, enough to re-pour a size if one candle of three goes odd. For fifteen candles, 100 + 100 + 50 g would leave only 10 g. Bought from nothing (your jars aside), the three-size order is ₹2,347.20 and the four-size order ₹3,374.60.

Why the packs never limit breadth, and what does

CSI's smallest in-stock packs are larger than a ladder needs: C1 comes in 20s (the 10-pack is out of stock on 1 October 2026), C2 and Cotton Braided in 10s. A C1 single and a 2 × C1 arm use 9 of the 20; a C2 single and a 2 × C2 arm use 9 of the 10. So five sizes fit in the same three packs as three, and the only wick cash a wider order adds is a holder pack for the pairs, or the C2 20-pack (₹188.80, +₹94.40) if a mixed pair pushes C2 past ten. Per wick it is the same ₹9.44 either way: C1, C2 and Cotton Braided are flat per wick in every pack.

What really limits breadth is everything around the wick. Each size is three more of your own 8 cm jars, three more 200 g pours, three more burn positions kept in still air for weeks, and three more candles to log at every session. A home bench that runs nine candles calmly may run fifteen badly, and a badly run fifteen tells you less than a well run nine. That is the practical cap, and it is why our rule stops at four.

The cut-to-length roll: a size you cannot place

The Braided Wick Roll with 100 wick tabs (61 meters) is the tempting fourth size, because it looks like flexibility: cut any length, tab it, done. The page describes "a long spool of braided cotton wick" and "100 Wick Tabs" and says "You can cut the wick to the desired length", but it states no braid size. Cut length changes how tall the wick stands, not how thick it is; the roll is one wick size whose position against C1, C2 and Cotton Braided you only learn by burning it.

Per tabbed wick, the roll is cheaper than C2 or Cotton Braided once bought, an honest point in its favour for production. For sampling it is the opposite: ₹706.82 of cash for one three-candle arm whose result you cannot place on the ladder until it burns. If your three-size order lands in a gap (C2 too small, Cotton Braided too big), the roll becomes a sensible gap-filler, priced against the other options in the gap-filling post. One more caution: whether a braid is primed (pre-waxed) changes first-light and early burn, and the roll's page does not say; how to test that variable is the untreated-to-pre-waxed post.

After burn 3: when breadth grows, and when it shrinks

The first order is a bet on the centre. Burn 3 tells you whether the bet was close, and the breadth of the next order follows from it. Screen at burn 3 with the candles burned in 3–4 hour sessions in still air, trimmed to about 5–6 mm; approve only after all three candles of a size pass the full life to about 1 cm left. Near the bottom, judge how close the flame sits to the glass by eye; never touch the glass to judge heat.

Notice how rarely the right move is "buy more sizes now". The three-size order, centred honestly, often closes in the first round, and when it does not, the packs you already hold usually contain the next size. Where a jar is genuinely single-or-pair, the cost of adding the pair arm in the first order rather than the second is set out in the 8.5 cm double-arm post.

From the winning size to the production order

When one size passes the full life on all three candles, size the production order with the formula from the cluster hub: wicks = candles × wicks per candle × (1 + allowance), 5% allowance in our worked example. Because C1, C2 and Cotton Braided are flat per wick, choose packs that add up to the number.

Reorder point for a single-wick winner: 4 wicks a day × your lead time + safety stock. With a 10-day order-to-bench time and a week of cover, reorder at 68. The 10 days is yours: CSI dispatches from Pune and does not publish lead times or stock depth, so confirm dispatch on WhatsApp before a big run.

What to buy for an 8 cm sample order, and what to skip

Five items, in the order a sample order uses them, chosen on page statements, price and stock on 1 October 2026. CSI publishes no wick-performance data, so nothing here is ranked on burn results. Oil counts use 16 g per 200 g candle and 12 g per 150 g candle.

Skip for the first 8 cm sample order: Eco Candle Wicks Loose (2 inch diameter) (₹413.00 for 5 m), whose page says "designed specifically for 2 inch diameters", far below 8 cm; the Eco Braided Wicks (₹472.00 for 5 m), unsized and with no tabs mentioned, a gap-filler like the roll; and Performance Wooden Wicks (₹590.00 for 10), one listing with no widths, so it cannot be a size in a ladder.

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