DMM/IMM Revision: Priority Mail “Regular” Flat-Rate Boxes Renamed “Medium” Flat-Rate Boxes

The Postal Service™ is updating the name of the exist­ing Priority Mail® regular flat-rate boxes, which will now be identified as Priority Mail medium flat-rate boxes.

The Priority Mail flat-rate box product line consists of one small box, two regular boxes, and one large box. Updating the name of the regular flat-rate boxes associates them with their respective size, and is consistent with the small and large sizes.

During the update transition period, regular Priority Mail flat-rate boxes will be identified as “regular/medium” flat-rate boxes in all Mailing Standards publications. The update does not result in any price changes.

We will incorporate these revisions into the next printed versions of the Mailing Standards of the United States Postal Service, Domestic Mail Manual (DMM®) and Mailing Standards of the United States Postal Service, International Mail Manual (IMM®) and into the May update of the online DMM and IMM, which are available via Postal Explorer® at http://pe.usps.com.