Personalized My First Christmas Dinosaur Long Sleeve T-Shirt. My First Christmas - A cute little dinosaur broke out of its egg, wearing a Santa suit and holding a present. Cute gift for your little one's first Christmas. 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