Wick Size Selector
Get a starting wick size for your candle by container diameter across the popular CD, ECO and LX series, in inches or millimeters. A burn-test starting point, computed in your browser.
Suggested wick sizes
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How this works
Wick manufacturers rate each size for a container diameter range. We match your vessel to the smallest wick in each popular series (CD, ECO, LX) whose rated diameter still covers it.
Wider vessels need a hotter wick to melt right to the edge; too small leaves a tunnel, too large smokes and overheats the glass.
These are starting points from an approximate size chart, not the wick maker’s own chart, so check your supplier’s chart too. Wick choice also depends on your wax, fragrance load and dye, always burn-test for a full, clean melt pool before settling on a size, and never leave a burning candle unattended.
What this does
A wick size selector gives a starting wick size for your candle by container diameter across the popular CD, ECO, and LX series, in inches or millimeters.
How to use it
- Measure the inside diameter.
- Enter it in inches or mm.
- Read the suggested wick per series.
- Burn-test to confirm.
How it works
The tool uses an approximate container-diameter chart for each series, not the wick maker’s own chart, and picks the smallest wick whose diameter still covers your vessel. Check your supplier’s chart and burn-test; very wide vessels may need a double wick.
Understanding your result
This is a starting point, not a final answer, because the right wick depends on your specific wax, fragrance, and dye as well as the diameter, so always test-burn before scaling up. Watch the first burn: tunneling means the wick is too small, while soot, a tall flame, or mushrooming means it is too big. Very wide vessels usually need two wicks.
Example
A 3-inch jar lands around a CD 12 wick as a starting point.
Last updated .
Frequently asked questions
How do you pick the wick?
We use an approximate container-diameter chart for each series (CD, ECO, LX) and match your vessel to the smallest wick whose diameter still covers it. It is a starting point: check your wick supplier’s chart and burn-test.
How do I measure my vessel?
Measure the inside diameter at the widest point of the melt pool. You can enter it in inches or millimeters.
Why might it say to use a double wick?
If your vessel is wider than any single wick in a series handles, two smaller wicks usually melt a wide pool more evenly than one oversized wick.
Is this a guarantee?
No — wick choice also depends on wax, fragrance and dye. Always burn-test for a full, clean melt pool. Calculations run locally in your browser.
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