Always loved these socks. But in the past I got mediums because that's more or less what my size fit. They were very good socks but still had a slight blister problem. However, I am extremely prone to blisters on my left foot (just below big toe (bunion area). This time I ordered small, knowing that they may be real snug. No, they are snug but not a determent. They are snug enough so the material doesn't slide or bunch at all. Ha, fit like a good glove or in this case a good sock should. Oh, I got Stride qtr sock, Ultra thin, Coolmesh II