I wear a size 11 comfortably and have worn Nike shoes for decades. It seems to me that Nike made a mistake with these sizes. I can put this size 11 next to my other size 11 (Nike items) and you can clearly see that they are not the same size. I stopped wearing them when I got a few blisters on my feet. I should have known better not to wear them. I will provide a photo later to show the difference.