Teenage Mutant Ninja Turtles T-Shirt, Size L 11/13. Could be a boy's or girl's t-shirt. Pre-owned, great condition, normal wear. No holes, rips or stains. Comes from smoke free home. Made of 60% Cotton & 40% Polyester Size Large - 11/13 Measurements: Underarm to underarm flat across is approximately 16.75 inches. Length of back of shirt is approximately 23.25 inches.