The wick size depends on the diameter of the resulting candles.
With cast or drawn candles the wick thickness and diameter of the candle equal. Example: for candle of diameter 7cm, the wick thickness is no. 7
If the diameter of the candle is halfway between 2 wick thicknesses always choose the wider wick. This ensures the candle stays burning when lit. Example: for candle of diameter 6.5cm, the wick thickness is no. 7
When rolling candles from beeswax sheets double the diameter of the candle to determine the wick size
required. The wick must also be dipped.