I am between a 7.5 and 8 but in a boot I like room for a sock, I ordered both sizes, The 7.5 felt tight so Ii returned it and kept the 8 which felt fine, I wore the 8 to work and by two hours later they had stretched out and became so loose and uncomfortable my feet hurt for two days.  Since I couldn't return them and paid quite a bit, I wore again a few days later but put in a heel support and wore a thick sock. They were fine. Really not worth the cost. Will not buy this brand again.