Listen to other reviewers: this shoe runs small. I normally wear an 11 in asics (and all other shoes for that matter). I had to order a size up and my toes are still almost at the end. Also, if your foot runs on the wider side of normal, get a bigger size. They were a bit stiff after I first put them on, but after about 30mins of wearing them, they started to feel better. The shoe looks GREAT on. It reminds me of superman ice cream :) Also, it's primarily mesh, so if you have to work around fluids (chemicals, health care, etc.) or in the weather, I'd give these a miss.