Usps Minimum Envelope Size. The Postal Service uses the word "flats" to refer to large envelopes, newsletters, and magazines. Additional size restrictions apply depending on.
The smaller boxes and envelopes are typically cheaper than the.
Find out which envelopes fall into the US Postal Service (USPS) letter, postcard, flats and parcels categories, together with maximum The US letter rate is suitable for most business envelopes and greeting cards, the minimum and maximum dimensions for which are give in the table below.
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Each size chart is grouped by envelope style and includes dimensions and available Low Minimum Quantities. The words large envelopes and flats are used interchangeably. The post office regulates the size of envelopes for the cheapest mailing option, first class mail.
