Review on Stay Dry with adidas Boys' Aeroready Short Sleeve Moisture-Wicking T-Shirt by Tom Bennett

My son had the same shirt and grew out of it so I did a search and found this one advertised as selling boys in sizes small to large. I needed a small US size for boys which is usually 6/7 in US size. When I opened it I found it was marked small but a size 8. They are usually US sized boys. So it's too big and I'm disappointed because I got it for my birthday. I'll probably leave it and let it grow, but be aware. Also, is the size chart on the site wrong because it only lists sizes for preschool boys? Just note this is not a US size for boys, small (6/7).