This listing for 100% Cotton wick square braeded Waxed Wicks with tabs size #3.9 inch Long .Contains NO Lead or Zinc.Standard size Tabs 20mm in diameter with 3mm neck.* Each wax burns at a different rate, Beeswax comes from many regions and different shade and scents, whether its filtered or not, and whether organic or not. all these factors have alot to do with burning rate of your candles.Best advice is to test your products. Thanks for Looking