A Postcard is Not a Postcard 

Most of us think a postcard design is printed advertising on thick card stock. It could range in size from 4″ x 6″ to  5½” x 8½” or 6″ x 9.” Some believe that these cards can all be mailed at first-class card rates or standard rates and the postage cost would be the same for each. Not true; a postcard cannot exceed  4¼” x 6.” These postcards have a special first-class card rate currently at $0.34 cents (retail). Anything larger is considered a letter and would mail at the letter rate, which costs more than the card rate. Postcard Dimensions | Postcard Size

Dimensions:

Minimum: 5″ long, 3½” inches high, and 0.007″ thick.

Maximum: 6″ long, 4¼” high, and 0.016″ thick

Postage costs for each first-class card range from $0.34 per card (retail) to as low as $.251 per card depending on the density of your mailing list. In order to achieve a rate per card less that $0.34 per piece, you would need to mail a minimum of 500 pieces and have your mailing list postal presorted.

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