These were my first pair of Docs. I'm usually a U.S. women's size 6-6.5. Size 3 was too snug (my toes were a little uncomfortable because they were kind of squished) and the 4 is way too big. I agree with other reviewers that this is a very clunky shoe. Maybe it looks that way because I have a slim frame, but compared it with other Docs and the Flora boot is visibly chunkier. When not on the foot, the shoes look super sleek. Since the shaft is sort of high, it will hurt your heel unless you wear tall socks, especially when going down stairs. The boot itself is also really stiff, although that might just be the way it's supposed to be. After wearing them consistently for almost two weeks, my toes, the bridge of my foot, and my heel still hurt. I hope these eventually stop hurting my feet, because I do like them, even if they do make my feet look huge.