Media Mail is not sealed against postal inspection. Regardless of physical closure, the mailing of articles at Media Mail prices constitutes consent by the mailer to postal inspection.
Media mail is used for certain types of books, films, manuscripts, printed music, printed test materials, sound recordings, play scripts, printed educational charts, loose-leaf pages and their binders consisting of medical information, video recordings, educational reference charts, and computer-readable media.
Video games, whether on CD-ROM, diskettes, or similar software, or playable systems including computers, do not meet the standards for Media Mail. Storage devices such as "portable hard drives", "thumb drives", "flash drives", "jump-drives", and "USB drives" for use with computers are not eligible for Media Mail prices. For specific eligibility please see DMM 173.3.
The maximum size of an item in combined length plus girth (distance around the thickest part) is 108 inches.
Mark each package "Media Mail" in the postage area.