I bought a size 9 when I am usually an 8. They fit perfect. Glad I read through the reviews before purchasing. I've had no issues with these boots. They keep my feet warm and dry in this bitter Upstate NY weather. I love that the inside of the boot is fuzzy and soft. The boot itself is stiff, takes some getting used to. At first, the feeling reminded me of snowboarding boots. Either way, it was a great buy!