Personalized Dinosaur Astronaut 1st Long Sleeve T-Shirt. Dinosaur Astronaut is floating in space with a 1 balloon celebrating its 1st birthday. Cute birthday gift for your 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