Size it Right for the Best Postage Rates
Size matters when it comes to sorting mail with machines. The USPS® has grouped mail into four size types. While there are complex calculations used to determine the size of your mail piece, here are a few guidelines that relate to most business mail:
- Postcard Rate - 4 ½ x 5 ½ and 4 x 6 postcards qualify for this postage rate
- Letter Rate - at least 3 ½" high x 5" wide but not more than 6 ⅛" high x 11 ½" wide
- Large Envelopes and Flats - bigger than a letter but not more than 12" high x 15" wide
- Packages - for everything else. If your mail piece isn't a postcard, letter or flat, then it's considered a package.
Thickness and shape also factor into mailing service rates. If you're using an especially thick paper or non-standard shape, your piece may not qualify for lower rates. Discuss your needs with our mailing services team to ensure that your design will meet your mailing budget.
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