Personalized White Intelligent Trombone Rough Text Youth Long Sleeve T-Shirt. Trombone, the instrument for intelligent people in rough white text is a funny low brass design with attitude for back to school, birthdays, holidays, marching band and graduation. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)