**READ WHOLE DESCRIPTION BEFORE ORDERING!** I DO NOT send the whole box. It is just the FOUR FLAPS. Made to fit LARGE PRIORITY MAIL BOXES FROM USPS. You can get them free at your local USPS or at usps.com. I can edit them to fit the Medium Flat Rate boxes, just let me know in the notes section at checkout if this is something you would like me to do. Otherwise, they will be made for the Large by default! There is an add on option on the main page if you would like a 12x12 bottom design add...