The United States Postal Service® (USPS®) published the final regulations for Folded Self-mailers (FSM's) and other unenveloped pieces in the December 1, 2011 Federal Register.
These final rules take effect on January 5, 2013, so Mailers need to make plans to use up remaining stock and to make design changes for affected mailpieces that will mail after the effective date.
These new rules do not apply to cards, envelopes, booklet style letters or mailpieces designed to carry discs - only self-mailers.
The notice lays out other specific requirements:
- Length: A minimum of 5 inches and a maximum of 10.5 inches. Height: A minimum of 3.5 inches and a maximum of 6 inches and
- The final fold must be at the bottom
- Rectangular within an aspect ratio (length divided by height) of 1.3 to 2.5, inclusive (see Domestic Mail Manual 601.1.4)
- The paper basis weight for folded self-mailers is based on book-grade paper unless otherwise specified and varies depending on the total weight of the mail piece.
- Minimum of two tabs
- Can not use perforated tabs.
Maximum thickness of 1/4".
Please visit the USPS website to see all of the new rules affecting self-mailers.
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