Personalized Unicorn Kitty 3rd Birthday T-Shirt. Cute 3rd birthday T-Shirt - White with big polka dot number three, pink flowers and adorable unicorn kitty cat. 3rd birthday gift for girls who love cats. 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.