Personalized 1st Birthday Panda Long Sleeve T-Shirt. Happy little panda is celebrating his first birthday! Cute 1st birthday present for the one year old! 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