What Is the Size of a Postcard in USA?

The size of a postcard is 4-1/4 inches high by 6 inches wide, maximum, to be eligible for First Class Mail postcard rate by the USPS.

what is the size of a postcardAny larger, and the USPS will call your mail a letter or flat, and charge a higher rate.

For the USPS, minimum postcard size is:  3-1/2″H  x 5″W.

Also, the USPS requires that postcards be a thickness of 0.007 inches, minimum; and 0.016 inches maximum.

Lastly, the mailing piece needs to be rectangular.

It makes sense to design your postcard to meet the USPS standards.  The First Class Mail postcard is given a very low rate by the USPS, and receives all the benefits of First Class mail, including mail forwarding and return if addressee not found.

A footnote — please note that our Postcard Magnets at magnetbyMail.com are not mailed using US First Class postcard postage.  Instead we mail most using rates based on bulk mail.  For more info about direct mail campaigns with magnet mailers, check us out at magnetbyMail.com  .  Or drop us a postcard!

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About postcardmagnets the USPS Postcard Blog

We print and mail Postcard Magnets. That's a large, laminated postcard and a magnet attached. They're used in mailing campaigns to promote a message or website. They're useful for businesses, non-profits, government groups, alumni associations and for political advertising. Our website is at magnetbyMail.com (please be sure to visit...) [Sorry, we're not an official USPS website -- better to check with them on any updated rates and rules...] View all posts by postcardmagnets the USPS Postcard Blog

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