Personalized Grandpa is my Hero Youth Long Sleeve T-Shirt. My grandpa is a superhero! He is my hero! Comic book theme t shirt for your child to wear on Father's Day, or any day. Grandpa will love it! youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)