Personalized Rocket 4th Birthday Long Sleeve T-Shirt. Happy 4th Birthday! A rocket blasts off from an alien world with a giant 4 for the four year old's fourth birthday! 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