Personalized Grandchild Gift I Have The Best Grandma Ever Long Sleeve T-Shirt. Grandchild I Have The Best Grandma Ever apparel and gifts. Click on the tabs to choose the product, size, and color that you wish this design to be printed on. 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