These are Unisex footwear. We have sized them on our website to match up with standard US women's sizes. Archie's says you can wear them with the heel hanging over a bit, but we haven't tried that yet, and are wearing still them with a lil room after our heel and it's been great.
ps. Our FAV thing about these (besides how insanely comfortable they are) is they are made with one piece.... NO more blowouts while "hiking".