So, I decided to try a different pattern that says you can make with a swim diaper. The Wee weka side snap pattern. I made one using M/L and FOE. This swim diaper is HUGE on Joel. No way it'd be able to contain in the swimming pool. Maybe next year??
So, I decided I liked that pattern for a swim diaper, so I used the S/M sized of the Wee Weka pattern. By this time I was getting nervous I was wasting PUL. But it fits!