I'm a 10 4E.  Finding a shoe (and a last) that fits is close to impossible.  Only two companies continue to hit it square on...NB and Rockport.  The beauty of this particular shoe is that I'm NEVER ever able to wear a slip-on...because in addition to being a 4E, I've got arches that make Utah jealous.  Which makes slip-ons impossible.  But this one actually works.  Who woulda thunk.