What matters most
Jar width matters more than jar height for the first wick guess. Wax blend, fragrance load, dye, and container shape push the result around after that.
Craft reference
A candle wick size chart that is still useful after the first bad burn test.
WickScope organizes wick choice by jar diameter, wax style, and troubleshooting. It is meant for makers who want a cleaner starting point before they burn through a week of test jars.
What you can check next
The guide breaks the topic into wax family notes, diameter ranges, printable lookup pages, and troubleshooting when the first test run tunnels or mushrooms.