Personalized Irish Shamrock Heart Long Sleeve T-Shirt. A heart made of shamrocks with Irish in green text is a unique gift design for Valentine's Day, St. Patrick's Day, birthdays and the winter holidays. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL