Just like Colarado Chris I take a size 42 in Sidi and got a 42 in black for these. When I took them out of the box they actually looked smaller but putting them on they fit perfectly, if not just touch wider than my Sidi's. So the size chart was accurate for me. The multiple inserts make finding the right comfort and arch support an adventure but hey, better to have more options than none. Quality of the shoe is great and they are very, very light. I think I prefer the Sidi Techno 3 closure system for an overall better fit but the velcro system does the job well. Only used them a couple of times so far so can't offer any comments on durability yet. Black will probably maintain a little better than white though.