I wear 8 1/2 size women's shoe I had to order either a size up or down. I ordered up to a size nine am I'm on the fence about it. My heel is at the back where it should be but, there is an extra inch above my big toe making my feet look large. I have been having problems with mortons neuroma and the foot doctor said I should order square toes shoes in the size 8 1/2. 2 e wide. I believe the would be xx wide not sure since this is something new I have been experiencing. This sandal I ordered the widest with and it is just a bit to wide. The sandal is nice looking and the toe separators fit nice. I would try this in a different width to see if I like the way it fits. I will be checking out other sandals with toe separators and compare. The only advice I have for this sandal if you are interested in buying would be the width. I know sometimes it is just a guessing game, having to return items is frustrating. Hope this helps