Q:

What is the average size of a postcard?

A:

Quick Answer

The average size of a standard postcard is 4 inches high by 6 inches wide. In the United States, a postcard of this size can be mailed under a special First-Class rate.

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Full Answer

The U.S. Postal Service allows customers to use the postcard rate for First-Class Mail for postcards that are at least 3.5 inches high by 5 inches wide but no more than 4.25 inches wide by 6 inches wide. As of April 2014, the postage rate for a postcard of this size is 34 cents.

USPS also has a First-Class rate for large postcards that are no more than 6.125 inches high by 11.5 inches wide by 0.25 inches thick. These postcards cost 49 cents to mail as of April 2014.

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