Flat-size pieces meeting the applicable automation standards in 201.3.0 are entitled to automation or Periodicals machinable prices. Size, weight, thickness, polywrap, and flexibility standards vary for the class of mail. For eligibility and preparation standards for specific price options, see the appropriate Quick Service Guide above.
Polywrap films and similar coverings must meet the standards in 201.4.4 . A list of approved polywrap and polywrap manufacturers is available on postalpro.usps.com. The wrap direction must be around the longer axis of the mailpiece, with the seam parallel to that axis. The longer axis is always parallel to the length of the mailpiece. The preferred seam placement is on the nonaddressed side of the mailpiece.