Personalized Rocket Kid 1st Birthday Long Sleeve T-Shirt. Blast off! A young astronaut sits on a red rocket as it flies off into space, zooming around a giant 1. Cute 1st birthday gift for your little astronaut. 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