1) "The first time burn a pillar an hour for every inch of its diameter": ok, I do so, and it works fine, but we use metric, one inch is approx 2,5 centimeters, so what should I tell to my customers? Do I have to tell "burn a pillar an hour for every 2,5 cm of its diameter"? It's too complicated I think.. Hi I label my candles clearly as a 3 x 3 and 3 x 6 inch, even though we also work on the metric system in South Africa. If people as me why, I just say that I use imported molds for my candles. It sorts out this issue. HTH