Sizes run as follows: Small: 4-6, Medium: 8-10, Large: 10-12. Model is wearing a small in the black, and a medium in the pink and navy. If in doubt, we recommend buying a size up for youth sizes, or contacting us for other sizing alternatives. Product care: Unless otherwise mentioned, all shirts and sweatshirts are machine washable and dryer friendly. As a side effect of the printing process, you may see a small faint box on your shirt/sweatshirt. This will go away after a wash or two, after which you will be in possession of the best gosh-darn looking' shirt you've ever laid eyes upon. Please note, we do not manufacture our garments, they are imported by us, and decorated in California. All of our shirts and sweatshirts are printed in beautiful San Luis Obispo, California We are fiercely committed to high standards of quality printing and unique design, backed by our unflagging and awesome customer service, because printing is our passion.