fit test

I just switched from some Aeris Velocity open-heel fins to my first jet fin style fin. I went with an XL pair of Deep 6 Eddy fins because of their buoyancy. After trying them in a pool I found that my feet wobble a bit left-to-right in the foot pocket. Is this normal with jet style fins? It...

This is a 3x, but I am almost thinking I need something bigger since it was such a pain to get off and on. Or maybe that is just par for the course when you are fat. What do you guys think? Imgur: The most awesome images on the Internet Do I need something bigger?