I use 8.5-9 wide and thought I had ordered 1 bigger size but I ordered 7.5-8.5 and they fit perfectly. I have not used them in water yet, but they are so comfortable I will likely be ordering a second pair to too a sleepers 😅. I seen reviews showing how they fall apart. I payed $13.68, I don’t expect a great quality. They are single stitched, that’s probably why they can fall apart. The sole is not glued at all, but I like it like that because I will be getting in the sand with them and I can take them apart when I put them up. The washing machine.