Boston Celtics Charcoal Youth NBA Adidas Pullover Logo Hoodie Youth Sizing tends to run SMALLER Youth Sizing 60% Cotton 40% Polyester Lightweight pullover sweatshirt. Basic Screen Print Graphics Please use measurements to find correct size laying Flat Youth Small 8 Pit to Pit 16 Inches...Top neck tag to bottom 19 inches 10-12 Medium, Pit to pit 18 inches...21 inches 14-16 Large, Pit to Pit 19 inches...22 inches 18 XL, Pit to Pit 20 and...24 inches