Personalized Wee Bit O'Irish Youth Long Sleeve T-Shirt. Cute St. Patrick's Day Youth Long Sleeve T-Shirt - White with a cute smiling shamrock wearing a green derby says WEE BIT O' IRISH. Perfect for a 1st St. Patrick's Day. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)