Personalized Cute Princess Is One 1st Birthday T-Shirt. When baby turns one it is such a big day and this cute princess crown design helps celebrate the important milestone on a pretty T-Shirt - White gift with pink lettering that says The Princess Is One. Great to wear in first birthday party photos. 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.