My feet tend to swell when I sleep, and therefore to be "EXTRA-wide when I first put on my shoes. These allow me to open the shoe VERY wide and get my feet in. Then, after walking around a bit, my feet get smaller, and a few quick tugs on the straps snug them right up. Ultimately, they wind up being a little TOO large, so if I know I'm going to be walking a LOT in the course of a day, I'll bring a gel-insert or a second pair of socks to make the final size adjustment. That is a bit inconvenient, but not the fault of the shoes.