I have arthritis on the top of my left foot and I needed a wide and high toebox, but I also have regular width feet. My left foot is size 7 and my right is 7 1/2. I bought the 8 and they are perfect with my size 7-8 inserts and slightly cushioned hiking socks. I've worn them on two easy but muddy and wet hikes and have stayed comfortable, dry, warm while everyone around me complained! I also supinate and with my inserts felt stable. Fantastic boot. I'm not sure if I can wear in the summer. Pretty sure they'll be too warm.