I purchased these to replace my Redhead clogs that I walked to death. Listened to the comments, ordered a half size up; they're a little big, I can fit two fingers in between my heel and the back of the shoe and the heel strap is tightened down as far as it can go. But! They are very comfortable and I don't think I'll be returning them for the next size down, as they might be too small. I probably know what you're thinking: "But Costello, Amazon makes it so easy to exchange your product for the right one!" I'm lazy and live by one motto: If it isn't broken, don't bother to fix it, otherwise you'll ruin it.