I sold something on ebay, and have to send it international. When I sent the invoice, I had a bunch of choices for shipping (I chose first class international in a thick envelope). Once she paid, I was preparing to print out the shipping label. It only gave me two options for shipping (express international and priority international)... Neither of them have a thick envelope as a choice. Priority international only has the choices of a flat rate box, a flat rate envelope, and a package. Would a thick envelope be considered a package? Also, how do you go about sending it. Can I send it USPS or do I have to use UPS because its international. Ebay already provides a shipping label, so can I just drop it in a drop box after I put the label on it?