What are the post office’s requirements for mailing postcards?

by Raki Wright | Last Updated March 4, 2010

In order to qualify for postcard rate postage (currently $0.28), the United States Postal Service requires small postcards (4 1/4″ x 6″ or less) to be made from paper that has a 7pt thickness or greater. All of the Burris Four-of-a-Kind Postcards™ meet this requirement.

Large postcards (greater than 4 1/4″ x 6″) are required to be made from paper that has a 9pt thickness or greater. All of the Burris Print On Demand Jumbo Postcards™ meet this requirement. The Jumbo Postcards must be mailed at first-class postage (currently $0.44).