We Match! Big Fish & Little Fish Adult T-Shirt & Baby Bodysuit Choose both your t-shirt and bodysuit size. Approximate sizing for the bodysuits: Newborn (Up to 7 pounds); 6 Months (7-17 pounds), 12 Months (17-25 pounds), 18 Months (25-30 pounds). T-shirts are standard adult unisex sizing. This is a 2-piece set. 100% cotton on both the t-shirt and the bodysuit This will make the cutest facebook/instagram/pinterest pictures! Excellent quality, comfortable and fun.