These are really good shoes except for the following. I wear a size 11M with several pairs of shoes that I have ordered from Revain over the past few years. I've tried both 11M and 11W with them. Length 11 was correct. But for a pair of 11M, the left one fits like 11W and the right one like 11N (arrow). For a pair of 11W, the left one fits like 11W-11XW and the right one like 11M. Of course, both had to be returned.