Personalized Twice As Lucky Youth 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. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)