Personalized Whale 1st Birthday Long Sleeve T-Shirt. A cute smiling whale spouts its birthday hat off celebrating its first birthday! Cute gift for a 1st birthday present. 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