I actually had the opportunity to carefully evaluate the shoes as they were terribly uncomfortable and damaged my heel. I've worn a size 10.5 for decades and in these I felt like I was in a size 9.5, my toes literally resting on the front of the shoe. Very tight on the sides, thought it would stretch, tear, a little but there is a piece of very stiff material that runs down the back of the heel that doesn't move and that was squeezing my heel. I'm sure it's a great shoe IF your foot fits…