Personalized Twins 1st St Patricks Day Youth Long Sleeve T-Shirt. Adorable twin baby boys or girls in green Irish hats with our 1st St Patricks Day quote on a Youth Long Sleeve T-Shirt - White holiday outfit. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)