I am usually an 8.5 in sneakers and after reading many many reviews about these shoes I ordered and it's a true fit, even with socks. I'm not accustomed to having great arch support all the time, so admittedly these are not all-day-wearing shoes, but I run outside on sidewalk and pavement - I'm sure these are going to save my knees in the long run, and the reflective materials are awesome.