Personalized Big Sister T-Shirt. Encourage your child to step into their new role with confidence and joy. With these adorable outfits, your little one will be ready to take on the responsibilities of being a big sister while looking absolutely adorable! 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.