Personalized Sister Announcement Big Sis Unicorn Face Long Sleeve T-Shirt. This adorable unicorn design is a sweet way to announce that your daughter will be a big sister. 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