I order a posture bra for an adult family member in need of back support. I ordered L/XL. It might fit a thin 10-year old. There is no refund option so I've written three emails to customer service asking what process to follow to exchange for some other item. Still no response! If you are a gambler and want to risk getting something you can use, don't care if you can't get a refund, and want to hassle without result for an exchange, this is the company for you! Zero stars for this rating!