Personalized Big Sister T-Shirt. Make every moment memorable with our Big Sister collection, perfect for photo opportunities and everyday wear. This apparel is not only a great gift for your little one but also a delightful way to announce the arrival of a new sibling. Choose our Big Sister designs to create lasting memories and foster a loving connection between your children. 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.