Personalized 3rd Grade Teacher (Premium) Long Sleeve T-Shirt. Genuine 3rd Grade Teacher Long Sleeve T-Shirt - White has fun vintage label in pink with premium quality quote for your favorite third grade school teacher. 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