Adorable Originals Brunette I'm the Big Sister T-Shirt: Let the new big sister know just how special she is! This cute T-Shirt lets her proudly proclaim her new big sister status. Makes a thoughtful gift for the big sister when her new brother or sister is born. Available in X-Small (2-3 years) or Small (3-4 years). The Adorable Originals Brunette I'm the Big Sister T-Shirt is made of 50% Cotton 50% Polyester. Machine wash inside out. Tumble dry low.