Personalized 1st Birthday First Birthday Owl T-Shirt. Celebrate your little one's first birthday with our adorable owl design apparel and gifts. Perfect for a baby girl, our collection features cute cartoon illustrations of owls, pink polka dots, and stars. Whether you're hosting a first birthday party or looking for a special gift, our 1st birthday collection is sure to bring a smile to everyone's face. 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.