I tried this on in a store (in a different color) and thought my normal size 9 felt a bit snug, so I ordered a 10. They are too big, but i had to use them in the snow. My feet stayed dry and warm and they look nice. The only thing about ordering them too big is the plastic ridge above my heel in the back cuts into me when I bend my toes forward. It is annoying, but maybe if I wear thicker socks, it will be ok.