I purchased the 7.5-10 size (I wear a size 7.5, and have a medium-width foot, very average) and these socks are uncomfortably tight in the toes. I can tell my toes will break through shortly.

The heels also slip off. Again, I have an average type foot. The fit is ridiculously bad. The socks slipped off from the first moment I put them on. The grip material they have in the back heel to keep them from slipping simply curled up.

Dont waste your money. I am returning these.