Go up half a size as they fit snugly. And they need to be properly laced (with internal and external loops - in one review, the pictures show the shoes were laced incorrectly). These are my son's basketball shoes. We have the #4 pair. Gives him ankle support to jump, traction to move fast and stop quick, and the HOVR bottom delivers amazing explosive power and height. We added some VK insoles and all I can say is wow. This is the perfect shoe for 4.5 players. We got a really tough season from every couple.