I wear a size 12 shoe with a wide width so I bought these socks in size 13-15 and I'm glad. They fit but just barely. The toes are surprisingly narrow and the ventilation channel is really just a thin part put into the top of the foot, I expect them to fail there or in the toes first. They stay up pretty well and the cushioned bottom feels nice especially in a shoe with memory foam insoles. I needed socks and I have large feet. There weren't a lot of affordable choices out there so I bought these. They'll do but there's really nothing special about them and I don't feel they'll last very long.