Personalized Little Sister Comic Book Long Sleeve T-Shirt. Little Sister! Pow! Cool! A little sister is like a superhero, not just a sidekick. Cute Long Sleeve T-Shirt - Red for any little sis! 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