A lot of other reviews complain about how loose this shoe is. I usually wear a 12.5 and ordered a 12. My toenails hurt after wearing these shoes all day, which I have never experienced in a running shoe of this class. That's why I hate these shoes and probably won't wear them again. they will gather dust in my house. I am not rating this 1 star as I think this is dominated by my decision to order a size smaller, but I would like to warn others: I would not order a smaller shoe size for this, especially if you are between sizes in a larger range.