Adorable Originals Blonde I'm the Big Sister T-Shirt: A perfect gift to bring home to the new Big Sister when a precious little one is added to the family. This special t-shirt will surely make her feel proud of her new title. Original design by Adorable Originals ~ The inI'm the Big Brotherin and inI'm the Big Sisterin Clothing Company. Available in X-Small (2-3 years) or Small (3-4 years). The Adorable Originals Blonde I'm the Big Sister T-Shirt is made of 50% Cotton 50% Polyester. Machine wash inside out. Tumble dry low.