Personalized My first St Patrick's Day Long Sleeve T-Shirt. Ideal for family gatherings, photoshoots, or just a fun day out, this St. Patrick's Day outfit is a must-have for your baby's wardrobe. Create lasting memories and share the joy of the holiday with this charming piece. 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