Personalized White Trombone Text Christmas Tree Youth Long Sleeve T-Shirt. A Christmas tree composed of trombone text and stars with musical notation garland is a unique low brass winter holiday gift design for musicians, music teachers and students in concert, jazz and marching bands. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)