Pittsburgh Steelers Salute to Service Print Performance Youth Black T Shirt 8-20 Please note sizing tends to run slightly SMALLER than average sizing. Youth Sizing 100% Polyester Performance Tee. Basic Camo Screen Print Graphics Color Black Measurements Youth 8 Small 15 inches Width pit to pit, 22 inches top to bottom 10-12 Medium 16 inches Width pit to pit, 24 inches top to bottom 14-16 Large 17 inches Width pit to pit, 26 inches top to bottom 18 XL 18 inches Width pit to pit, 27 inches top to bottom