I recommend referring to the size chart when measuring your foot. These are not shoes and fit like socks although they have a textured bottom. When I first received the socks I treated them like shoes which meant I expected a slight gap between my toes and the material of the shoe. But the socks aren't like that, and it was my fault. I wore these socks during indoor training and really liked their comfort and fit. Thank you, HAG1Joe G. MSgt USAF, RetiredJohn 3:30