I measured my bare feet, and going by the bogs size chart ordered a 10. it was WAY too big (wearing heavy socks, these boots were still more than an inch too long at the toe -- even with an ankle curve which leaves about a 1/2-inch of footbed behind the heel open and unusable). they also had some black marks on them, which really stood out on yellow boots. if they fit and didn't have black spots they'd be fantastic (as long as they really are waterproof rather than water resistant). nice and tall. but I'm sending them back...