Personalized Treble Clef Music Band Director Or Choir Long Sleeve T-Shirt. Treble clef symbol Long Sleeve T-Shirt - White for a drum major, choir director, singer, music teacher, marching band musician. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL