The 16-oz. size is the best value. This candle will burn from 90 to 100 hours. We use only lead-free wicks for safety. Make sure that you clip your wick to 1/4" before you light the candle. And remove any debris left by the wick. Do not move the candle before the wax has solidified. Burn this candle for 1 hour per inch in diameter of the candle, or until the wax has come to a full melt across the top.