Personalized Little Peanut 4th Birthday Youth Long Sleeve T-Shirt. 4th birthday THIS LITTLE PEANUT IS FOUR Youth Long Sleeve T-Shirt - White with cute cartoon baby peanut and big red balloon. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)