Personalized Coolest Tuba Youth Long Sleeve T-Shirt. The world's coolest tuba player with a snowman tuba player wearing a music note scarf is a humorous low brass design. Fun gifts for musicians and band geeks at birthdays and holidays. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)