Personalized Little Monkey Girl 1st Birthday Youth Long Sleeve T-Shirt. Celebrate your 1st birthday with this cute Youth Long Sleeve T-Shirt - White THIS LITTLE MONKEY IS ONE design that has a cute smiling monkey holding a banana on it. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)