I ordered a size 11 because another size 10 boot I ordered was too small. Happily this size 11 fits me the way a size 10 should! So order a larger size than you need.

Living in Upper Michigan, I definitely know a great pair of snow boots when I wear them, and THESE are truly GREAT! I'm actually from Florida and moved up here two years ago. In that two years, I have owned about 6 pairs of boots, TRYING to find a pair that would actually keep my toes warm! I've tried some of the best names in winter boots and NONE of them have done the job. None, that is, until these! My toes are actually toasty warm, even when I'm out in sub-zero temps for HOURS at a time! I absolutely LOVE these boots! They fit EXACTLY as I expected. Having said that, I ordered a size and a half SMALLER than I normally wear in other shoes, simply based on reviews and comments here on Amazon. They actually fit well enough that I can wear these with one OR TWO pairs of thick winter socks, although I don't anticipate ever NEEDING to wear with two pairs of socks.
Most boots that claim to keep your feet warm in temps down to -40 degrees F are LYING. The comfort rating on these boots is probably accurate. I've actually worn them in temps down to -35 (with the wind chill) and my feet have NEVER been cold, not even my toes! As I said earlier, it's my toes that usually get cold in all of my other (more expensive) snow boots. If these last even ONE of our brutal winters, I will be THRILLED with them. I will say that I bought a bottle of suede/nubuck protectant to make them "water proof" and it has also done it's job. I've already worn these boots in a couple FEET of snow and NEVER had wet feet or lower legs.
At the time that I bought these boots, I believe I paid like $33 for them. I've owned other boots that cost well OVER $100 and NEVER been satisfied with them. This is, by FAR, the best $33 I have EVER spent. On ANYTHING.
Do your feet (and TOES) a favor and BUY these boots! You can't possibly go wrong with these, especially if you live anywhere in the Northern Tier.

PS- I have not been compensated in ANY way for my HONEST review of these snow boots. If Amazon feels the need to compensate me, it will be GREATLY appreciated, though. ;)