Personalized Irish St Patricks Day Letter A Monogram T-Shirt. Irish Letter A T-Shirt - White alphabet gift. Sure an this stylish Irish letter A is just right for wearing on St Patrick's Day, if your name begins with A. Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.