whoa.... you are ready to start a business and you don't know what wick size to use? Before you think about the burning times you should worry about getting your combinations down. You will need to test every jar with every scent with a chosen wick until you get it down. You will have to do this with every scent, every jar, when you change something like the wax, you will need to test again. once you get your wick, fo , wax, and container down you can record the butning times then. do some more searching on here there is LOTS of good info on here. good luck!