Personalized Irish Shamrock Letter P Monogram Youth Long Sleeve T-Shirt. St Patrick's Day gift Youth Long Sleeve T-Shirt - Black has shamrock monogram Letter P design for St Paddy's Day parades and parties with green clover background and black alphabet P. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)