My son is 5, 40” tall. Was wearing champro XS just a few months ago and they were pretty tight to put on, so we found a size small for him. (Purple on the left). He wanted a yellow pair to match his jersey, so we ordered these (yellow), and they are much bigger than expected. They’ll do, but not as tight and I’m afraid they’ll fall down while he’s playing soccer. Good deal for the price! And will definitely use when he’s 7-9 yo.