I read all the reviews about size. I wear a 61/2. I decided to size up to a 7. They're a little big, but I like toe wiggle room. They are amazing! I have a pair of WDW Mickey Mouse Crocs that I love, but these can't compare. I have a bad knee, walking with my new crocs with nubs on the insole actually makes my knee feel better. These are SO light weight I don't take them off as soon as I come in. Floating on a cloud!