We moved to Chicago from Phoenix and lacked decent winter attire.  I bought this boot for my husband for Christmas. He wears a size 7 but all other reviews said these ran small. So I ordered the size 8. Sure enough, the boots fit just right and they are extremely warm. They are very padded so ensure your sock is a thinner, maybe wool blend sock.
This was a great purchase and I am glad I listened to other reviews about ordering 1 size bigger.