I went back and forth on sizing. I was told to size down. I typically wear 7 or 7.5. Got the 7 and at first it felt a little loose. Tried the 6.5, my heal didn't slide as I walked which I liked but my toes and the top of my foot were pinched in and felt numb if I wore too long. Stuck with the 7 and can wear the boot comfortably with a thick sock.