I have tried four different brands of wicks in the last two years of candle making, and I keep coming back to the CSN series. These wicks just work for me. I use GB 444 soy wax in 2.5 diameter glass containers, and the CSN 12 does the trick. It's a good starting point to see whether or not I need to wick up or down for my different fragrance oils. Small mushroom, but that's definitely okay because the scent throw I get with these wicks is phenomenal. A+, CandleScience.