My foot measures 11 inches, yet both XL and XXL were too large as a swim sock. Perhaps these should only be marketed for paddle boarding or surfing - but not for swimming.
I love going out and paddleboarding but I don't like getting my feet mucky wnd when the water gets cold in the fall it can be quit chilly to the toes the neoprene booties work SO GOOD. Not only did it keep me feet clean but warm. They were actually quite thick and had great grip on the bottom. I loved the hight of them and definitely recommend them for anyone weather you just want some protection on your feet or to keep warm.