Personalized Greatest Grandpa Long Sleeve T-Shirt. World's Greatest Grandpa Long Sleeve T-Shirt - Athletic Heather gift has vintage style logo on a Father's Day or new Grandpa gift for him in blue and tan. 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