Personalized My first St Patrick's Day Long Sleeve T-Shirt. Gift this lovely piece to new parents or add it to your baby's wardrobe for a fun celebration. It's a perfect keepsake to commemorate their first St. Patrick's Day, making it a must-have for any festive occasion. Dress your little one in style and let the celebrations begin! 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