If the piece is folded more than once or is bound and then folded, the height of the piece is based on the final fold. Above the address line containing the recipient's name. Below the city, state, and ZIP Code line. Above or below the keyline information. Above or below the optional endorsement line.
Additional standards apply for address block barcodes.
Polywrapped Pieces Must meet all seven properties in Exhibit C820.4.1a . Pieces at least 5 inches long, 0.009 inch thick. Flexibility No requirement. This guide is an overview only. For the specific DMM standards applicable to this category of mail, consult the DMM sections referenced above and the general sections within each DMM module.