Personalized 3rd Grade Teacher (Premium) Youth Long Sleeve T-Shirt. Genuine 3rd Grade Teacher Youth Long Sleeve T-Shirt - Heather has fun vintage label in pink with premium quality quote for your favorite third grade school teacher. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)