Personalized I'm Three Youth Long Sleeve T-Shirt. I'm Three! A foam finger and hand number three with "three" spelled out with a 3 in the E. Is there any doubt who three! Cute gift for any little sports fan. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)