Personalized Irish Mommy Lucky Charm St Patricks Youth Long Sleeve T-Shirt. Mommy's Lucky Charm St Paddys Day Youth Long Sleeve T-Shirt - Black outfit for son or daughter with Irish shamrock and rainbow. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)