https://pe.usps.com/businessmail101?ViewName=Cards

But to qualify for mailing at the First-Class Mail postcard price, it must be: ... price for postcards, so you don't have to worry about your postcard being too big ...

https://www.papersizes.org/postcard-sizes.htm

Postcard sizes explained, together with maximum and minimum dimensions ... International maximum size is considerably bigger than the USPS maximum size.

https://www.printplace.com/articles/standard-postcard-sizes

What are the standard postcard sizes for mailing and EDDM®? We have the answer to this question and more in this guide to printing and mailing postcards.

http://www.subtlenetwork.com/what-is-the-best-size-of-a-postcard.html

If you are going to invest time and money into a postcard marketing campaign, ... Your postcard can't be bigger than 6 inches by 11.5 inches by .25 inches thick.

https://toughnickel.com/industries/Postcard-Size-Guide

Apr 11, 2018 ... This postcard size guide covers the standard postcard size, optional larger postcard sizes, ... Instead, you can make a bigger postcard! (I know ...

https://www.uprinting.com/standard-postcard-printing.html

UPrinting offers quality standard postcard printing. Every design is printed on durable cardstock material. Our coating options protect the postcard from damage ...

http://designerstoolbox.com/designresources/postcards/

All measurements are in inches. These are standard postcard sizes. Check with United States Post Office before mailing. Designers Toolbox is not responsible ...

https://legalbeagle.com/7146126-size-postcard.html

Postcards are mailers that do not have an envelope to open, according to the ... of large envelopes, such as manilla mailers and thinner, padded envelopes.

http://usprinting.com/index.iml?mdl=selections/view.mdl&PAGE_ID=29760

Please use the guidelines below to assist you in creating postcards that will be accepted by a mailing house or the USPS for delivery and answer some common  ...

https://www.oldpostcards.com/postcard-sizes-types.html

... Postcards 3 1/2 X 5 1/2 (9 cm X 14 cm) 5% Continental Size Postcards 4X6 inches (15 cm X 10.5 cm) The Size of the Postcard is displayed on the Big Image  ...