Gabriel Ideas Written by Gabriel

"What Size Postcard for Postage Stamp?"

By Gabriel Aug 06, 2026
a diagram showing the size and width of a standard postcard size card, with measurements for each side
a diagram showing the size and width of a standard postcard size card, with measurements for each side

Postcards, a classic way to send a brief message, come in a variety of sizes. But with such diversity, a common question arises: what size postcard can you use a postcard stamp? This article explores postcard sizes, stamp requirements, and simplifies the process for you.

a diagram showing the size and width of a standard postcard size card, with measurements for each side
a diagram showing the size and width of a standard postcard size card, with measurements for each side

Understanding postcard sizes and their corresponding postage is essential for ensuring your message arrives without extra charges or disappointments. Let's delve into the specifications and guidelines that will help you choose the perfect size and ensure your postcard reaches its destination safely.

Learn How to Fill Out a Postcard in 5 Easy Steps
Learn How to Fill Out a Postcard in 5 Easy Steps

Understanding Postcard Sizes

Postcards range from the standard size to oversized jumbo cards, each with its unique dimensions and postage requirements.

Draw Your Own Postcard Free Printable Template
Draw Your Own Postcard Free Printable Template

The United States Postal Service (USPS) classifies postcards into three main sizes:

  • Standard Postcard (3.5" x 5") - This size is widely accepted by postal services worldwide, making it an ideal choice for international correspondence.
  • Oversized Postcard (4.25" x 6" or larger) - Postcards larger than the standard size, often called Double Postcards, require additional postage.
  • Jumbo Postcard (9" x 12" or larger) - These extra-large postcards are classified as First Class Packages or Flat Rate Envelopes and may require special postage.
Usps Postcard Guidelines Template - Ablebionics
Usps Postcard Guidelines Template - Ablebionics

Standard Postcard Size (3.5" x 5")

The standard postcard size is perfect for local and international use. It's dimensionally sturdier than typical greeting cards, allowing for more design space and capabilities.

For standard-sized postcards, USPS offers a departamento postcard stamp, which is currently 0.40c. Besides mailing domestically, these stamps can be used internationally, with some countries requiring additional postage.

Free Printable Blank Postcard Templates [PDF Included] - Printables Hub
Free Printable Blank Postcard Templates [PDF Included] - Printables Hub

Oversized and Jumbo Postcards

Oversized and jumbo postcards add a unique touch to your correspondence but come with additional postage requirements.

For oversized postcards, USPS charges an extra 0.01c for each inch over the standard size, up to a maximum of 13" x 15". Jumbo postcards, on the other hand, fall under First Class Package rates or Flat Rate Envelope prices, depending on their dimensions and weight.

Stamped Postcards + FREE Postcard Download
Stamped Postcards + FREE Postcard Download

Postcard Stamps for Different Sizes

To ensure your postcard arrives at its destination, select the correct stamp based on its size and destination country.

Understanding the Standard Sizes of Stamps
Understanding the Standard Sizes of Stamps
Postcard backside – free to print | iHannas Blog
Postcard backside – free to print | iHannas Blog
two envelopes with writing on them sitting next to each other in front of a green background
two envelopes with writing on them sitting next to each other in front of a green background
Free Postcard Ephemera Sheets
Free Postcard Ephemera Sheets
an image of a postage stamp with the words adobe illustrator and stamps on it
an image of a postage stamp with the words adobe illustrator and stamps on it
an old postcard with the words postcards for less written on it
an old postcard with the words postcards for less written on it
Postcard Size Postage Stamp Destination
Standard (3.5" x 5") Departmento Postcard Stamp (0.40c) Domestic & select international
Oversized (4.25" x 6" - 13" x 15") Extra Stamp (0.01c per inch) + Dept. Postcard Stamp Domestic
Jumbo (9" x 12" - 11.5" x 13.75") First Class Package or Flat Rate Envelope Domestic
International International Postcard stamps (varied rates) International

International Postcards

Sending postcards internationally requires knowledge of the destination country's postal policies. Some countries accept standard postcard stamps, while others require additional postage.

To ensure successful delivery, research your destination's postal requirements or use international postcard stamps, which vary in rate and are available at post offices or online.

Embracing the art of postcards begins with understanding their sizes and postage requirements. By following this guide, you'll master the craft of sending postcards, whether domestically or internationally, and express your creativity and thoughts with confidence.