After reading a million reviews in relation to sizing I took the plunge and went with the size I wear for Nikes. When they arrived I was super excited by the look, great design, but on trying them on, it looked like i was wearing clown shoes. The curled up toe and extra length just looked comical. I sent them back and ordered a half size down (this time directly from diesel as they had a 30% off sale - sorry amazon). They were very tight when they arrived, but i sprayed them with leather stretcher and ran around for half an hour. What do you know... they fit perfectly. Super snug and comfy. Reminds me of converse sizing - long and thin. But the look - cant be beat. Great mix of class and rugged combat boots (although my wife thinks they look like classic doc Martin's, which I don't agree with). My only advice would be to get leather stretcher when you order them and make sure you look at the other color options that are floating around diesel.