Personalized Twin Girls 1st St Patricks Day Youth Long Sleeve T-Shirt. 1st St Paddys Day girl twins in Irish hats with our first St Patricks Day quote on Youth Long Sleeve T-Shirt - White outfits. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)