Personalized Color Block 16 Long Sleeve T-Shirt. Color block 16th birthday Long Sleeve T-Shirt - Pink with pink and lavender color blocks, birthday cake, balloons and the numbers 1 and 6. 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