I bought a size bigger knowing my feet are wide and tall, so the depth was tall enough, but just barely.  But of course that made them too long, so they slipped off my heel. Most manufacturers fail miserably when considering shoe depth in extra wide shoes.  They always, always, always seem to be too shallow. These are no exception. You can open the flaps to give more width and depth, but then the length won't fit right.  Will return.