Answers
You must leave clear a rectangle measuring 4.25" from right side of postcard or letter and 2.25" from bottom of postcard
or letter to allow enough space for an OCR-readable address and/or barcode. Mail permit must be placed above and to the
right of the address block. The area to the left of the OCR Read Area should be free of any address information.
If your mail piece address block fails to meet the requirements of the USPS as shown, you may incur additional postage or your mail piece may be rejected by the USPS.
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Only First Class mail offers a special rate for postcards.
Postcard Minimum Size: 3.5" x 5" x 0.007" thick
Postcard Maximum Size: 4.25" x 6" x 0.016" thick
Letter Minimum Size: 3.5" x 5"
Letter Maximum Size: 6.125" x 11.5" x 0.25" thick
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Standard Mail does not offer a special rate for postcards.
Letter/Card Minimum Size: 3.5" x 5" x 0.0007" thick
Letter/Card Maximum Size: 11.5" x 6.125" x 0.25" thick
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