Personalized Promoted to Big Sister T-Shirt. Encourage your little one to embrace her new title with this fun and fashionable clothing option. Perfect for everyday wear or special occasions, it's a must-have for any soon-to-be big sister. 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.