Personalized Triangle Tiangles Long Sleeve T-Shirt. Triangle text with a percussion triangle replacing the letter A and surrounded by triangles is a unique music gift design for percussion musicians. 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