These seem like great, well-made water shoes - if they fit you properly. I’m a true size 8.5 and the mediums (7-8) were too snug and the larges (9-10) were too loose. I also bought the women’s size equivalent in the men’s version (small, men’s size 7-8) and those fit about the same as the women’s larges. Sadly, I’ll be returning all three.