Personalized Princess 1st Birthday Long Sleeve T-Shirt. Pink Princess 1st birthday. This pink heart with a jeweled tiara will make your baby girl's first b-day special. Happy birthday 1-year-old! 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