I wear size 11 but prefer to buy wide so I can be comfortable in my shoes. There was no 11W so I took a 12. Right decision. They are somewhat narrow at the top so I am glad I went one size up. However, what I found is that because it was a size bigger my toes didn't quite reach the front. Overall, I am very satisfied with the purchase as the inside is very comfortable and I wore it for about 4 hours comfortably. BTW: I got many compliments.