I'm 6'2. 174 lbs usually wear size 10 tuk lowtop viva creepers. Based on other reviews, I ordered these boots one size up as size 11, especially because I might want 2 prs socks on really cold days thiswinter... Whatever, I'm really stoked with these boots. they fit and feel great on me immediately without having to break em in, with one pair of socks. And I can tell I do have enough of a little bit of extra room at toes etc to wear a second pair of socks this winter if need to. Receiving a lot of complements from random people on street with these just like with all my other TUKS. Customer service was very very easy to work on one extremely minor thing needed corrected and sure enough they sent overnight free what I needed to correct the minor issue. Thanks as always TUK, you guys rule!