Let's see. I have a size 11, right in the middle of the recommended range, and they are too tight. Second, the middle of these socks is tighter than the rest of the socks, which makes you feel like the middle of your foot is constantly being squeezed. This is as annoying as it sounds and nothing in the site description warns you about it. Third, as mentioned in other reviews, they don't even keep your feet warm, which is the whole point of these socks, so they're painful and useless. They look pretty cute, which almost makes them two stars, but they're not.