Get your child ready for another exciting Notre Dame season. Here is a nice, polyester long sleeve Notre Dame Fighting Irish shirt made by Colosseum. The shirt fits a boy's size 20. It measures 19 inches from armpit to armpit and 25 inches from collar to bottom. Please compare these measurements against those of a comfortable shirt your child now wears to ensure the proper fit. The blue shirt has green zipper on the neck and the Fighting Irishman logo on the upper left. The back is blank.