Personalized Irish Nana Little Leprechaun Youth Long Sleeve T-Shirt. Cute leprechaun St Patricks Day Youth Long Sleeve T-Shirt - Royal Blue Irish shamrock with Nana's little leprechaun quote for grandchild. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)