Candle Wick Size Chart: How to Choose the Right Wick by Container Diameter
Wick sizing is the single most common thing beginners get wrong, and it's the root cause of most tunneling and sooting complaints. Wick manufacturers use different sizing codes, so treat this as a starting range - always do a test burn before finalizing a batch.
Up to 2 inches diameter: a single small wick (thin cotton core, low flame height).
2 to 3 inches diameter: a single medium wick.
3 to 4 inches diameter: a single large wick, or consider switching to two smaller wicks for a cleaner, more even melt pool.
4 inches and up: two or three wicks spaced evenly across the diameter, rather than one oversized wick.
How to tell your wick is too small: the melt pool doesn't reach the edges of the container even after several hours of burning (tunneling), and wax builds up on the jar walls.
How to tell your wick is too large: a tall, flickering flame, visible soot on the inside of the glass, and the candle burning noticeably faster than expected.
Because the right wick also depends on your specific wax blend and fragrance load, treat any chart - including this one - as a starting point rather than a guarantee. Our digital guide includes a full wick-selection walkthrough with test-burn troubleshooting for exactly this reason.
Frequently Asked Questions
Why do wick sizes vary between brands?
Different manufacturers use their own sizing codes (letters, numbers, or both) based on their specific wick construction, so a "medium" from one brand isn't guaranteed to match a "medium" from another. Always check the manufacturer's own diameter chart alongside general guidance like this.
Can I fix a candle after pouring if the wick is wrong?
Not in the same pour - you'd need to remelt the wax and start over with a different wick. This is exactly why a small test batch before committing to a full production run saves both wax and frustration.
