I Want to Standardise My Candle Business Around One Jar Diameter — Can That Significantly Reduce the Number of Wick Sizes I Need to Stock?

The before-and-after stock sheet

A worked example makes the trade visible. The business pours 600 candles a month across four jars and two oil groups, light (florals, herbals, citrus) and heavy (vanilla, coffee, oud, resins). The approved builds below are illustrative test results, chosen to show what standardising does to stock; they are not the wicks these jars need in your wax. The 8.5 cm jar is your own: CSI lists no jar at 8.5 cm.

After standardising, all 600 candles go into the 150 g Clear Glass Jar: 300 light-oil candles on C1 and 300 heavy-oil candles on C2 (again illustrative; the migration test below is how you earn those approvals). Here is the stock sheet side by side.

Monthly packs: before, C1 needs 320.25 (3 × 100 + 2 × 20 = 340), C2 336 (3 × 100 + 2 × 20 = 340) and Cotton Braided 52.5 (50 + 10 = 60); after, each SKU needs 315 (3 × 100 + 20 = 320). All of it excludes jars, oil, wax, labour, freight, packaging and GST. Whether the jar side of the business (lids, fills, labels, cartons) simplifies too is complexity arithmetic, worked through in the one-8 cm-jar complexity post; this page stays on the wick shelf.

Why the per-wick price does not move

Every tabbed wick in the worked example is priced flat per wick across packs: Eco C1 ₹5.90 from the 20-pack to the 1,000-pack (the 10-pack is out of stock on 1 October 2026), Eco C2 ₹9.44 from the 10-pack to the 1,000-pack, Cotton Braided ₹12.00 from 10 to 1,000. Consolidating volume onto fewer SKUs lets you buy bigger packs, and bigger packs cost exactly what the same count costs in small ones.

So the monthly wick spend falling from ₹5,420.30 to ₹4,602.00 (₹818.30 a month) needs reading carefully. None of it is price. It comes from builds: 75 Apothecary candles on two C2 (₹18.88 of wick each) become single-wick 150 g candles, and the Cotton Braided build disappears. Average wick cost per candle goes from ₹9.03 to ₹7.67 because the candle is smaller, not because the wick got cheaper. You are also selling less wax and oil per candle; compare products like for like before you call that a saving.

The alternative route to fewer wicks keeps several jars but chooses them at one diameter band, so capacity changes with height rather than width; that business case is the similar-diameters post. And if you would rather keep your jars and trim wicks instead, the audit for consolidating SKUs without forcing oils onto the wrong wick is the SKU-reduction audit.

Safety stock: where the real saving sits

Safety stock is the cushion you keep for a late delivery or a busy week. The worked example uses a simple rule (our judgement): ten days of use per SKU, but never fewer than 50 wicks, enough for a production batch and a retest. That floor is where small SKUs cost you. Cotton Braided at 50 a month needs only 17 wicks of cover by the ten-day rule, but the floor holds 50; ₹396.00 of Cotton Braided sits on the shelf only because the SKU exists.

The release is ₹677.88, and the biggest single piece is Cotton Braided's floor. Days-based safety stock barely moves when total volume stays at 600 candles: C1 and C2 simply carry what Cotton Braided used to. That is the honest shape of the saving: fewer floors, not less cover. Add the order cycle and average wick stock held falls from about ₹5,179.68 to ₹3,988.40, roughly ₹1,191.28 less cash sitting in wicks. Real, and small next to what the same 600 candles hold in oil and wax.

One jar, still two wicks: fragrance sets the floor

Even in a single jar, the wick is chosen for jar × wax × oil × load, and the oil part does not go away. Heavier and vanillin-rich oils (vanilla, coffee, oud, some resins) are commonly linked to needing a larger wick or to more carbon on the wick than light florals and herbals: a tendency, not a law, and CSI publishes no wick data for any oil. That is why the worked example ends at two SKUs, not one.

How few can you get to? One wick for every oil happens only when your oils behave alike in that jar, and the only way to know is to screen them. Two behaviour groups is the common landing point; a third appears when one oil fails both group wicks, and in a 150 g jar the next step above C2 is Cotton Braided, whose page describes it for "large-diameter candles exceeding 8 cm", a long way above a 6.3 cm inside diameter. If a very heavy oil needs more than C2 here, the honest options are a lower load within the page range, a different oil, or a wick CSI does not list: ask us on WhatsApp before you add a SKU for one oil. How to run a house standard with two groups and an admission test for new oils is the behaviour-group standard post.

Which oils in a range need their own build is the subject of the next cluster: five fragrances in one 200 g jar and lavender fine, vanilla tunnels cover exactly that question.

The migration test order

Standardising is a jar change for every oil that used to live in another jar, and each of those oils needs its own approval in the standard jar. In the worked example the business sells ten oils; six were already approved in the 150 g jar, four move in from the other jars: two light (Eucalyptus Spearmint, Lemongrass and Lime) and two heavy (Coffee Vanilla Tobacco, Palo Santo). Group assignments are our judgement until the screens confirm them.

The 14 g left in each 50 g bottle is one more candle, not a re-pour of three; if a screen needs repeating, buy another 50 g of that oil only. Notice what the test does not include: a full ladder for each oil. The group wicks were already bracketed in this jar when its first oils were approved, so new oils are admitted by screen on the group wick and a full-life pass; an oil that fails the screen gets its own bracket. That is the two-group standard doing its job.

After the switch: the production order and the 500-pack question

Once every oil has an approval in the standard jar, production follows the formula from the cluster hub: wicks = candles × wicks per candle × (1 + allowance), here 300 × 1 × 1.05 = 315 of each SKU, rounded to 3 × 100 + 20 = 320 (₹1,888.00 for C1, ₹3,020.80 for C2).

Now the C2 500-pack. At ₹4,720.00 it is ₹9.44 a wick, exactly the 10-pack's price. Before standardising, C2 ran at 320 a month split across three jars, and a 500-pack was 1.6 months of a wick whose demand depended on three products. After, C2 runs at 300 a month on one product; a month plus safety stock is 415 wicks, so the 500-pack is roughly a month plus cover (1.7 months of use). That is the first point at which it is a defensible buy: one pack instead of four, and no price penalty for it. It is still not a saving, and it is still exposed to change: a new jar batch or a different heavy oil re-opens the approval.

Reorder point for C2 after the switch: 10 a day × a 10-day order-to-bench time + 100 safety stock = reorder at 200 wicks. The 10 days is your figure: CSI dispatches from Pune and does not publish lead times or stock depth, so confirm dispatch on WhatsApp before a big run. Per-SKU reorder points at higher volume are the 500-candles-a-month reorder post; a business still running several jars should read the three-jar stock map instead, because there the stock is the union of approvals, not one jar's two wicks.

If, after standardising, a supplier change or a "slightly different" new jar batch arrives, the narrower jar range makes it cheap to check: two builds to confirm, not six. A jar that turns out 5 mm wider gets a two-arm confirm order; a wick from another supplier is a new wick, and the side-by-side it needs is the supplier-switch post.

What to buy to standardise, and what to skip

Five items: the standard jar, its two wicks, two of the four oils moving in, and the wax the approvals are made in, 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 12 g per 150 g candle and 16 g per 200 g candle.

Skip once you have standardised: Cotton Braided Wicks (₹120.00 for 10) unless a heavy oil fails C2 in the standard jar, since its page describes it for jars "exceeding 8 cm"; the Steel Wick Holder (₹250.00 for 5), with no double-wicked candles left; and Performance Wooden Wicks (₹590.00 for 10), a third material, not a third rung.

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