2. No mail piece can be larger that 108" combined lenth and girth
3. A 1-ounce letter, larger that 6 1/8" x 11 1/2" or outside of the aspect ratio of 1.3 - 2.5, is assessed the $ .12, non-standard surcharge in addition to postage. The aspect ratio is the length divided by the width. This requirement encourages mailers to create mail pieces that are "sufficiently rectangular", a specification required by high speed letter sorting equipment.
4. The USPS weight limit of a single mail piece/package is 70 pounds
5. The following dimensions must be met for automated processing by USPS:
|
Height: Length: Thickness: |
3-1/2" Min 5" Min. .007 Min. |
6-1/8" Max 11-1/2" Max 3/16" Max |
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