Personalized Some Ding Youth Long Sleeve T-Shirt. A percussion triangle with text, Triangle, it has that certain some-ding is a humorous music design. Fun gifts for musicians, teachers and students at back to school, 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)