Personalized Promoted to Big Sister T-Shirt. Whether it's for a pregnancy announcement or just to celebrate sibling love, this outfit is a must-have. Let your child proudly wear their title as "Big Sister" and enjoy the joy of welcoming a new baby into the family. It's a perfect way to create lasting memories together. 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.