Walmart says "men or women" and socks package says "men", but feet are the same shape for both, but men's are bigger. I'm size 9 1/2 women's. (Which translates to size 7 1/2 men's). The socks are size 10 men's (basically 2 sizes larger than my feet), but they fit okay, if a little loose and bulky. They work fine inside of my wellies, or my steel-toed boots (both of which need really fat socks to fit right), and good with my slippers as well. Not so good a fit in my walking shoes, unfortunately.