I ordered these in 11s and they are roomy as needed for me. The battery on the lightspeed version lasts a LONG time! Other than that, he loves them! It holds all of my yard/gardening tools and they fit on it perfectly. These sandals seemed like the were going to be comfortable. Amazon, as always, was fantastic in allowing me to exchange them. A couple of 10, 12 and 13 milers and two long 20 miler runs. Easy to install, sturdy and perfect for my farmhouse bathroom ]I was hoping to wear this today when it arrived, but it was too small. 4 x 2.