Order a size bigger then what you normally wear. I recently purchases 3 pairs of this brand of sandal, 2 adult & 1 kids size. All of them fit the exact same way. I wear a 10.5 so I ordered a size 11 and it fit too perfect (border line small). I needed a 12. For the kid, my son is a 2Y but needed a 4/5. Keep in mind I like my sandals a bit larger than my foot, about 1/2&#34; in the back. All in all i love the sandals, the sizing is my only issue.