Personalized Promoted to Big Sister T-Shirt. Make the transition to big sisterhood memorable with our delightful clothing line. These outfits not only celebrate the arrival of a new sibling but also create lasting memories for your family. Gift your child the joy of being a big sister with our fun and fashionable apparel, and watch her shine as she takes on this exciting new adventure! 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.