I ordered my usual size 8 which is my normal size for all shoes including sandals. However, I wish I would have taken the other reviewers' advice and sized down . The straps are made of this thin stretchy almost "bungee" type of elastic which causes my feet to completely slip out of them while walking. If the elastic were stronger/thicker then my feet would probably stay put. I still think they're super cute and wear them for trips to the grocery store but still find myself tripping from time to time. So for me not exactly functional for all day wear.