I have some 9 oz tumbler jars and these are perfect. I tried CD18, but it was too much, definitely much better with CD16. No smoking and burns perfectly.

I love using these wicks but I must say, I have another bag (2nd time) where I wick my jar, pour my wax and when I go to stabilize the wick to my wick tool, the wick comes away from the metal! It’s so frustrating when you can’t depend on your wick to stay in the metal piece.... as far as the wicks go they work great!

I have run so many tests on CD 10-18 with jars with 3.2" diameter openings and ranging from 9-12 oz. These for some reason always come out on top with a nice even covered melt pool with no soot visible soot coming from the wick after 2 hours. After my maximum of 4 hours there is minimal if no soot on the rim of the jar and the melt pool is perfectly across and about 1/4 inch deep. I use a soy wax that can hold about 10-12% and usually average at 11%. This wick works great for my size and volume jars.

I tested this wick 2 -3 times and it was good for 3.25 jars. now it's not working. doesn't reach the edge of the jars. this is a large order I have for a customer. Not good

This wick burning well, but leave only one inches pool around. Not what I was hoping for

I used an 8oz straight sided jar. A fragrance load of about 6%. After about 3hrs my melt pool did not reach the edge of the rim. Close, but still not where it should be. I previously tested the CD 18s and they were too hot, causing black soot and a out of control flame. So going up a wick doesn't seem like an option. Any suggestions?