Personalized Funny 1st Day Of School Youth Long Sleeve T-Shirt. So cute for any teacher to wear on the 1st Day Of School, this funny pencil design is great for all grades. Add your name or school name below the logo on a Youth Long Sleeve T-Shirt - White. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)