Wick Size Guide

Candle Making Guide

Use this wick size guide to choose a starting wick for container candles, wax melts with wicks, tins, tumblers, and multi-wick jars. Wick size depends on jar diameter, wax type, fragrance load, dye, and candle shape, so treat every recommendation as a starting point for testing—not a final formula.

Important: A wick guide cannot replace burn testing. Always test the finished candle with the exact wax, fragrance oil, dye, jar, and wick you plan to sell.

Quick Wick Starting Point Finder

Enter your jar diameter and candle type to get a practical starting range. Test one size smaller, the suggested size, and one size larger whenever possible.

Starting recommendation

Select your candle details above, then calculate.

Wick Series: Which One Should You Try First?

Do not choose by wick size alone. Choose the wick series first, then test sizes inside that series.

Wick series Best starting use Burn personality Watch-outs
CD Wick Soy, paraffin, vegetable blends, harder-to-melt waxes Reliable, versatile, hotter than many standard cotton wicks Can mushroom if oversized or fragrance load is heavy
ECO Wick Soy wax and natural wax container candles Hotter burn, good for soy wax that needs help reaching full melt pool Often too aggressive for some paraffin blends; test carefully
HTP Wick Containers, votives, pillars, harder waxes, blends Self-trimming style with stable burn and good rigidity Can run hot in soft wax or small jars
LX Wick Paraffin, soy blends, pillars, votives, clean container burns Controlled curl, cleaner flame profile, good when CD/ECO feel too aggressive May need sizing up in stubborn soy or high-fragrance blends
Premier 700 Wick Soy, coconut wax, paraffin, para-soy, containers, pillars, votives Very fine size steps, useful for precision testing More size options means more testing decisions
Zinc Core Wick Paraffin, gel wax, tealights, votives, some containers Rigid, cooler-burning cored wick Not the best first choice for soy or natural waxes; can mushroom
Wooden Wick Decorative container candles and crackling-style candles Visual, premium look, wider flame style Requires careful wax/fragrance testing; flame can become unstable if oversized

General Diameter Starting Points

This table gives a plain-English starting point. Exact wick size depends on your wax and fragrance.

Container diameter Single or multi-wick? Starting approach Testing note
1.5–2.0 in Single wick Small ECO, CD, LX, Premier, or zinc depending on wax Watch for overheating in tiny tins and tealights
2.25–2.75 in Single wick Common container range; test one medium-small wick series If tunneling appears after two burns, size up one step
3.0–3.25 in Usually single wick Medium wick sizes; CD/ECO/Premier often tested here for soy Heavy fragrance or dye may require a stronger wick
3.5 in Borderline Try one larger wick and compare with two smaller wicks One oversized wick may soot or make the jar too hot
3.75–5.0 in Usually multi-wick Use 2 or 3 smaller wicks spaced evenly Multi-wick candles need extra heat testing around the full jar wall

How to Measure Your Candle for Wick Testing

1. Measure inner diameter

Measure the inside opening of the jar, not the outside edge. For tapered jars, also check the narrower lower section.

2. Choose 3 test sizes

Test the suggested wick, one size smaller, and one size larger. This prevents you from trusting a single lucky burn.

3. Keep the formula fixed

Do not change wax, fragrance oil, fragrance load, dye, jar, and wick at the same time. Change one variable only.

Burn Test Checklist

A good wick should create a controlled flame, a steady melt pool, good hot throw, and safe jar temperature without heavy soot.

Good wick signsSteady flame, controlled melt pool, minimal mushrooming, clean jar wall, good scent throw.
Under-wicked signsTunneling, weak flame, wax hang-up, poor hot throw, flame drowning after several burns.
Over-wicked signsLarge flame, smoking, soot, deep melt pool, fast wax consumption, jar getting too hot.
Formula change warningChanging fragrance oil, dye, wax supplier, jar shape, or fragrance percentage can require retesting.

Multi-Wick Guide

Large jars often burn better with multiple smaller wicks instead of one oversized wick. One oversized wick can create a tall flame, heavy mushrooming, soot, and excessive heat before the melt pool reaches the edge.

Jar width Recommended test setup Placement rule
3.5 in Compare 1 larger wick vs. 2 smaller wicks Keep wicks centered and evenly spaced
3.75–4.25 in Usually 2 wicks Place wicks equal distance from each other and from the jar wall
4.5–5.0 in Usually 3 wicks Use a triangle layout and avoid placing wicks too close to glass
Wide bowl candles 2–4 small wicks depending on width and depth Test for full melt pool without overheating the container

Common Wick Problems and Fixes

Problem Likely cause Next test
Tunneling Wick too small, wax too hard, fragrance load affecting burn Go up one wick size or try a hotter wick series
Large flame / soot Wick too large, too much fragrance, wick not trimmed Go down one wick size or try a cooler wick series
Mushrooming Carbon buildup from wick size, wax, fragrance, or long burn time Trim wick, reduce wick size, or test another wick series
Weak hot throw Under-wicked candle, poor fragrance/wax match, not enough cure time Retest wick size before increasing fragrance oil
Jar too hot Wick too large, too many wicks, jar too narrow, excessive fragrance load Stop using that formula; size down or redesign the candle

Recommended Next Steps

Wick testing is easier when you test in small batches. Start with sample packs, keep notes, and compare one variable at a time.

Shop Candle Wicks Try wick series and sizes for testing. Shop Candle Wax Compare soy, coconut, paraffin blends, beeswax, and additives. Use Fragrance Oil Calculator Calculate fragrance oil before wick testing.