Usually wear 11, got 11 and they are big. My foot slides around so I added a heel insert and they are alright now. I think the memory foam is what makes the foot slide around. Comfy though. After a couple months the stitching around the steel toe started the undo and had to use some industrial glue to stop it fro  coming undone. Both shoes have done this. After 4 months, they are still comfortable.