Review on 👕 Top-notch Deal: Amazon Essentials 2 Pack Performance Royal Boys' Clothing for Optimal Style and Comfort! by Jeff Westra

my 9 year old tall guy. I originally ordered a size 10 knowing I might have to exchange it. I did and bought a size 12 instead. Fits great. Covers the stomach when raising the arms and relaxes without tightening the chest area when lowering the arms. He really likes the Dri-Fit material. If your son is of average height, 10 is probably perfect for a 9-10 year old. If he is a husky I would go one size bigger than his age. If it makes sense The exchange process was easy. There is a return label just in case.