I have a wide foot, high instep, skinny ankle and muscular legs. I usually wear an 8.5 w. While I love the fact that I can literally slip in and out of these quickly and smoothly because of the extra wide ankle and calf, they are floppy and my foot slides around a little when I walk. I am thinking I will order a 7 next time and see if that makes a difference. They are very comfy and keep my feet dry in the mud, that is what I bought them for. Nice cushioned foot and heel beds. Totally recommend, but be mindful of how large they actually run.