These are a size 13 for my boyfriend, which is apparently a super hard size to find, because it took me forever to find these. Now, aside from actually fitting, they hang tight! Like a swift current won't dislodge them from your foot like some brands. They are comfortable, and are really good at keeping twigs, leafs, and sand out of your shoes. They are breathable and you can swim in them very easily. The downside is they aren't the most durable, don't expect them to survive all summer if you float a lot. I do 1 float a month in the summer and These have lasted for 2, but now have a hole in the side by the arch of the foot. Not enough to keep us from getting one more use out of them, but I'm trying to be as honest as possible here. Floating is abusive to water shoes. I automatically buy new ones every summer, because I know last year's will not survive or have already been thrown out. Water shoes are just one of those things that you should expect to buy, again and again and even more if you have growing kids that float with you like mine do. Quality wise, these have lasted longer than others. I've bought some that are junk by the end of the float, so the fact that these will last 3 floats is saying something.