Personalized Amazing Tuba White Text Youth Long Sleeve T-Shirt. Tuba the most amazing instrument there is in white text with a band of music notes is a unique sousaphone musical instrument gift design for low brass musicians, music teachers and school students in concert and marching band. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)