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Flats (USPS)

From Wikipedia - Reading time: 4 min

The United States Postal Service uses the words "flats" and "nonletters" interchangeably to refer to large envelopes, newsletters, and magazines.

Size restrictions[edit]

To fit the definition a flat must:

  • Have one dimension that is greater than 6-1/8 inches high OR 11-½ inches long (the side parallel to the address as read) OR ¼ inch thick.
  • Be no more than 12 inches high x 15 inches long x ¾ inch thick.
  • Weigh no more than 13 ounces.

Furthermore, the item must be somewhat bendable: see the USPS Domestic Mail Manual for exact details. This general rule does not apply to: Automation rate flats and Standard Mail Enhanced Carrier Route flats.

Postage[edit]

The maximum size for a flat provides enough room to enclose much material. An issue, however, is that the higher the weight the higher the postage, especially for First-Class Mail.

External links and references[edit]


Licensed under CC BY-SA 3.0 | Source: https://en.wikipedia.org/wiki/Flats_(USPS)
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