Postcard sizes: what to know?

Print anything with Printful



Postcards are a cost-effective way to send greetings or marketing messages. They have lower postage and material costs, and consumers are more likely to read them. To qualify for the lowest rate, postcards must meet specific size and shape limits set by the USPS. Personal postcards use the standard first-class rate, while bulk rates are available for large volumes. Postcards outside of size requirements can still be sent with a more expensive stamp. Automated or bulk rate postcards have even stricter requirements, available from local post offices.

Postcards are an inexpensive way to send a quick greeting or marketing message. Not only is postage cheaper for a postcard, but the absence of an envelope also makes materials cheaper. This lower cost, coupled with the fact that a consumer is more likely to read a postcard’s message before throwing it out, makes it a wise choice for direct marketing. To qualify as a postcard and get the lowest rate, however, it must fit within certain specific size and shape limits.

In the United States, first class postage for a postcard is approximately 40% cheaper than first class postage for a letter. Postcards for personal use are typically sent using this standard first class postcard rate. A bulk or automated rate is available for sending a large volume and further reduces the cost of sending the card.

For a piece of mail to qualify as a postcard, it must meet several requirements set forth by the United States Postal Service. Postcard size is an important requirement for any piece of mail sent with a first-class postcard stamp. If the size requirements for a postcard are not met, the item may not be delivered, as postcards do not always include a return address.

The United States Postal Service has the following requirements for postcards sent using a postcard rate:

Postcards must be at least 3.5 inches (8.89 cm) high, 5 inches (12.7 cm) wide, and 0.007 inches (0.018 cm) thick.
They cannot be larger than 4.25 inches (10.8 cm) high, 6 inches (15.2 cm) wide and 0.016 inches (0.041 cm) thick.
The postcard must be rectangular in shape.
It cannot contain stickers or attachments that make it larger or thicker than the dimensions indicated above.

A postcard of any size or shape outside of the above dimensions can be sent via the United States Postal Service, it simply requires a more expensive postage stamp to post. If in doubt, the courier can use a postage stamp or ask the local post office for the amount of postage needed. A good rule of thumb to follow is that a postcard should be 0.5 inch (1.27 cm) taller and at least as wide and thick as a index card.

Postcards sent with an automated or bulk rate have even more stringent size and shape requirements. These requirements are available from your local post office, which can help you determine if your postcard meets the specifications for automation rates. Postage compliant pre-franked postcards are also available for purchase direct from the Post Office.




Protect your devices with Threat Protection by NordVPN


Skip to content