I bought XXL (10-13) and they fit my size 11.5 feet fine. I can't imagine cramming a size 13 foot into one. They are slower than the v-cut fins and long blade fins but I like how they force me to kick correctly. If I don't kick just right, they slide horizontally and I don't get any power. For breaststroke, they are usable but I'm faster without them. The biggest problem with them is that at a certain speed, they fill up like buckets of water attached to my ankles and start separating from my feet. I have to get going pretty quick for this to happen but it kind of stinks to have that built in speed limit. I've thought about drilling holes in the toes so this doesn't happen so much.
I bought XXL (10-13) and they fit my size 11.5 feet fine. I can't imagine cramming a size 13 foot into one. They are slower than the v-cut fins and long blade fins but I like how they force me to kick correctly. If I don't kick just right, they slide horizontally and I don't get any power. For breaststroke, they are usable but I'm faster without them. The biggest problem with them is that at a certain speed, they fill up like buckets of water attached to my ankles and start separating from my feet. I have to get going pretty quick for this to happen but it kind of stinks to have that built in speed limit. I've thought about drilling holes in the toes so this doesn't happen so much.
