Personalized Christmas Owl 3rd Birthday T-Shirt. Christmas owl 3rd birthday T-Shirt - White with a polka dotted number three and adorable owl in a Santa hat and striped scarf. Look Who's Three! 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.