Personalized Blast Off For 3rd Grade Long Sleeve T-Shirt. Get ready for grade school Long Sleeve T-Shirt - Charcoal with a rocket ship, planet and stars says BLASTING OFF FOR 3RD GRADE. Back to school gifts for 3rd graders and 3rd grade teachers. 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