Personalized 5th Birthday Penguin Long Sleeve T-Shirt. 5th Birthday Long Sleeve T-Shirt - Pink party celebration gift has cute penguin in a polka dot hat with the number 5 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