The main goal in container candles is to melt the wax to the glass wall.
If the wick is too small, wax will never reach the edges and you’ll get tunneling.
If the wick is too large, the glass may overheat and the candle can soot.
How to pick a wick
1) Measure your jar’s inner diameter at the widest point. For example, if it’s 6 cm, we’ll look up wicks that suit a 6 cm jar.
2) Use a wick chart. Find your wax and jar diameter, then note several candidate wicks (sizes/series) suggested for that combo.
Open the tables —
OpenHow to read the charts
— Wax types are listed in the left column.
— Jar diameters are listed along the top.
— Cells show suggested wick series/sizes.
Always select several nearby sizes for testing; each system is different, and exact matches are not guaranteed.
What if your wax or jar isn’t in the chart?
— Choose a chart for a similar wax (e.g., another soy or coconut container wax) and start from those sizes.
— You don’t have to buy the exact brand shown in a specific chart. For the same wax/diameter you can try analogous series from common families such as CD, ECO, HTP, LX, RRD, or STABILO. Test and compare.
How many wicks to buy for the first test?
— Don’t buy every size. Take a small “ladder” around the suggested size (for instance: one size down, the suggested size, and one–two sizes up). That’s usually enough to find a match quickly.
How to know the wick is right
— The melt pool should reach the glass edge within about 40–60 minutes (depending on your wax and FO).
— The flame is stable, without smoke/soot or a big “mushroom.”
— The jar is hot but still safe to handle.
— Melt-pool depth at the end of a session doesn’t exceed ~1 cm.
— Trim the wick to 0.5 cm (¼") before every burn; test under the same trim.