Personalized Lucky Sock Monkey Youth Long Sleeve T-Shirt. Youth Long Sleeve T-Shirt - White with an adorable smiling green sock monkey in stripes and polka dots holding a shamrock. Text says LUCKY MONKEY. Cute for St. Patrick's Day. Graphics by JW Illustrations. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)