I ordered a size 13 shoe, and the width that was shown was medium.  When I pulled the shoes out of the box, you could just tell that they were too narrow.  I can't imagine anyone with size 13 feet that would have narrow enough feet to run in these shoes.  I gave it a try and had to call it after just two miles, as I was getting serious hot spots on the outside of my feet.  I'm returning them because they just don't work for me.