Personalized 1st Grade Teacher Appreciation Gift Long Sleeve T-Shirt. 1st grade teacher Long Sleeve T-Shirt - Black back to school gift says I love my incredible kids. 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