Personalized Penguin 3 Year Old Birthday Long Sleeve T-Shirt. 3rd Birthday Long Sleeve T-Shirt - Pink has cute Penguin wearing a party hat with the number 3 on its tummy. 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