Personalized Treble Clef Sing Music T-shirts Long Sleeve T-Shirt. ocal Musician Treble Clef Long Sleeve T-Shirt - White Show your love for singing with this fun choir or chorus design. It features a large treble clef sign with fun music themed Sing slogan. 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