Personalized Lemon Poppyseed Muffin Youth Long Sleeve T-Shirt. Do you just love a soft, moist lemon poppyseed muffin? This one is just right and comes on a fun Youth Long Sleeve T-Shirt - Heather gift for muffin lovers. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)