Personalized Panda 4th Birthday Youth Long Sleeve T-Shirt. Help your child celebrate their birthday in a special way. Panda 4th Birthday Youth Long Sleeve T-Shirt - White, features a cute, fluffy panda bear with number four on its tummy. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)