I usually wear a 8 4E width in a New Balance.  Ordered a 3E and 5E in this style and found that the larger Propet shoe was comparable to the 4E New Balance sizing that works for me.  Like with all brands, I order two widths (5E & 3E) and kept the larger width size not knowing what one would work.  I have worn running errands but have yet to see if the shoe is waterproof as advertised.  Will be wearing on daily walks/hikes immediately and put to the test.