Personalized Ahoy Matey 3rd Birthday Youth Long Sleeve T-Shirt. 3rd birthday Youth Long Sleeve T-Shirt - White with a life preserver and a big number 3 says AHOY MATEY! WHEE I'M THREE!. Perfect for your little skipper's third birthday. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)