Personalized Trombone Teacher Cupcake Youth Long Sleeve T-Shirt. Funny Trombone teacher - Will Work For Cupcakes design is so sweet on a Youth Long Sleeve T-Shirt - White occupation gift, stocking stuffer or retirement keepsake. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)