Hi: You might try one wick size htp 105. If not, wick up to htp 126, if you are trying to use one wick. I have used one htp 126 in an "ivy" bowl with the same measurements your jar is. I tried one htp 1212, and it burned the wax, but it was too much heat and soot, so I went down the htp 126, it burned it slower and anything on the sides did catch up and I had a nice melt pool. Good luck! H:D