Personalized Grandpa's Garage Long Sleeve T-Shirt. Long Sleeve T-Shirt - White with an old model T says WHAT HAPPENS IN GRANDPA'S GARAGE STAYS IN GRANDPA'S GARAGE. Perfect for grandpas that love old cars. 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