I am most often size 10-1/2 and have very wide feet.  I wear Keen a lot because they are very generous in their width.  Even in their regular "D" width they accommodate my "EEEE" feet.  Based on other reviews I ordered size 11 in these.  I was expecting them to require some break-in but they were incredibly comfortable right out of the box and have remained that way so far.  I have high arches so I won't be wearing these for long walks or hiking but I have other Keens for that.  I got complimented on these the very first time I wore them in public.  Have already purchased a second pair in another color.