I'm normally a size 9.5/10 in shoes, but when I buy online I tend to go with a size 10 because that generally works for me. Even if the shoe is slightly too large, I can always wear thin socks, tighten a buckle, etc. to make the shoe fit comfortably. With this shoe even if I bought a size 11, it wouldn't fit. The toe box is so narrow that I would have had to cut off my last two toes to squeeze into these shoes. Yikes. Returned.