Personalized Twice As Lucky Long Sleeve T-Shirt. Irish Engineer, twice as lucky. Anyone can find a four leaf clover but you'll need an engineer to come up with a better, luckier, eight leaf specimen. Fun gift for birthdays, holidays and graduation. 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