Personalized My first St Patrick's Day Baby's First St Patrick's Long Sleeve T-Shirt. Dress your baby in this delightful outfit and let them join in the fun of St. Patrick's Day celebrations. It's a wonderful way to introduce your child to the joy of traditions while keeping them stylish and cozy. 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