Personalized Astronaut Kids Occupation Long Sleeve T-Shirt. Cute children's future occupation design with colorful lettering and handprint logo says When I Grow Up I'm Gonna Be An Astronaut on this kids career Long Sleeve T-Shirt - Charcoal. 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