these are very small. - i bought size large based off of their size chart. these were for my father who wears a size 10.5 shoe. wool socks tend to fit him well and with him having circulation issues having somethign that compresses so tightly doesn't do well for him. These were too tight. So i took the socks and wear them. I am a size 6.5 shoe. They hurt my feet becasue they're just so tight.