Personalized 1st Birthday Tuxedo Penguin Long Sleeve T-Shirt. Happy 1st birthday! This cute penguin celebrates a baby boy's first birthday. Complete with a classy tuxedo! Personalize and add your baby's name. 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