I bought a white Fila pair a few weeks ago after reading reviews where I ordered half a size up. I went further and got 11 usually wear 10.5 good item 11 was perfect for me. I liked the comfort so much that I decided to buy a few more pairs, another white and black pair, the white pair is a size 11, fits just like the ones I've bought before. But after trying on a black pair I found them very tight in the toe box and rubbed my pinky toe on the side and my toes went all the way up in the shoe and ended up pressing inwards. From the outside they look exactly the same size but when I pulled out the insoles and measured them I found that the black pair was a full size smaller than the white one, or about a quarter of an inch, I have provided photos showing those the size show difference. The insoles are stacked on top of each other, as you can see it's a big difference. So if you're buying a black pair, I can suggest you go a full size up. I will return them for size 11.5. Love these shoes overall, they are very comfortable if you are the right size.