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# How much does it cost to mail a 6 and a half inch square envelope?

Updated: 9/18/2023

Wiki User

13y ago

An envelope with a height exceeding 6 and one-eighths inches, and any square envelope, is non-machinable. Therefore, the rate for first class US domestic postage is \$.64.

Wiki User

13y ago

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Q: How much does it cost to mail a 6 and a half inch square envelope?
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