https://pe.usps.com/BusinessMail101?ViewName=Cards

With First-Class Mail postcards, you pay a low price and get all of the benefits ... of those dimensions and you'll have to pay flats (large envelope) postage prices.

https://www.usps.com/business/prices.htm

USPS postage rates offer low-cost mailing and shipping prices for domestic & international customers. ... Standard-sized, rectangular postcards From $0.35.

https://blog.mailing.com/simple-guidelines-for-usps-postcard-rate-size-

Jun 14, 2018 ... USPS Postcard rate and size guidelines can get tricky. But we're here to help you understand the basics and apply them to your direct mail ...

https://www.summitprintingpro.com/resources/postcard-specs.html

Since mail pieces are sent to USPS already addressed, ... Standard Rate Postcards by Class and Size.

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

Postcard sizes explained, together with maximum and minimum dimensions in ... at least 1968 when special postcard postage rates were abolished in the UK.

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

When it comes to postcard printing, size does matter. Postcards are a popular direct mail tool. To best make use of USPS rates, they have to meet certain ...

https://www.stamps.com/usps/postcards/

USPS First Class postcards are a low cost method to send marketing ... To qualify for postcard pricing, your mailer must be at least 3 ½” high, 5” long and 0.007” ...

https://www.postcardmania.com/blog/usps-postcard-size-guide/

Sep 7, 2018 ... ... the right size postcard! Read this simple pricing guide here... ... usps postcard size guide: 4 options for maximum postage savings. Most small ...

https://www.umkc.edu/finadmin/mail/documents/USPS%20standard%20dimensions%20for%20postcards%20letters%20flats.pdf

Below are the USPS standard dimensions for postcards, letters and flats. Postcard. Dimension. Minimum. Maximum. Height. 3-1/2 inches. 4-1/4 inches. Length.

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

Learn about the different Postcard sizes & choose the best option for your printing ... Q: What are the postage rates that apply to mailed postcards? ... Q: Is there no way to mail out my cards if they don't follow the USPS mailing condition?