What You Need to Know Before Mailing

Postcard stamps are an essential but often overlooked part of mailing that can save you money and prevent delays. As prices change in 2025, understanding postcard stamp costs and requirements before sending your mail is more important than ever. Whether you're sending holiday greetings or marketing materials, getting the right postage ensures your postcards reach their destination on time without unexpected fees. In this article, we’ll break down the latest postcard stamp prices in 2025 and highlight everything you need to know before mailing postcard-sized items.

Understanding Postcard Stamps and Their Prices in 2025

What Are Postcard Stamps?

Postcard stamps are postage specifically priced and designed for mailing postcards domestically. They differ from standard letter stamps because postcards are typically lighter and smaller, requiring less postage. Using a postcard stamp reduces mailing costs while ensuring your card meets USPS requirements.

Current Postcard Stamp Prices for 2025

As of July 13, 2025, the price for domestic postcard stamps increased from 56 cents to 59 cents. This marks a modest 5.3% increase, reflecting USPS’s ongoing adjustment to operational costs and inflation. Here’s a quick snapshot:

• Domestic postcard stamp: 59 cents (up from 56 cents)
• International postcard stamp: Currently $1.80, up from $1.70

For senders, using the correct postcard stamp means your item qualifies for the postcard mailing category, which can be less expensive than using a standard letter stamp. Keep in mind, the postcard must meet USPS size and thickness requirements to qualify.

Postcard Size and Mailing Requirements

USPS Postcard Dimensions

To use postcard stamps effectively, your postcard must conform to specific size guidelines set by USPS. The minimum and maximum size limits determine whether an item is considered a postcard or a standard letter, which affects postage prices.

• Minimum size: 3-1/2 inches high x 5 inches long x 0.007 inch thick
• Maximum size: 4-1/4 inches high x 6 inches long x 0.016 inches thick

Postcards outside these ranges need to use standard letter postage or additional postage if oversized. Correct sizing ensures you only pay for postcard postage rather than higher first-class letter rates.

Weight Limits and Thickness Guidelines

The USPS limits the weight of postcards to one ounce for standard postage rates. If your postcard exceeds this weight, you'll need to add additional postage to cover the extra weight. Thickness also matters, as postcards must be thick enough to feed through machines without jamming — too thin or too thick could require special mailing or additional charges.

How Postcard Stamp Pricing Compares to Other Mail Types

Postcards vs. Letters: When to Use Which Stamp

Although postcard stamps cost less than standard letter stamps, they are only suitable if the mailpiece meets postcard specifications. When sending thicker, folded, or heavier mail, you must use First-Class letter postage, which currently costs 78 cents for a Forever stamp as of 2025.

Additional Postage for Non-Standard Postcards

If your postcard is oversized, unusually shaped, or heavier than one ounce, you will need to pay extra postage. This might mean combining postcard stamps with additional stamps or using a First-Class letter stamp instead. Examples include:

• Oversized postcards such as 6" x 9" or larger
• Postcards with added embellishments like ribbons or attachments
• Cards printed on thick cardstock exceeding weight limits

Failing to affix proper postage risks delayed delivery or return to sender.

Tips for Buying and Using Postcard Stamps

Where to Purchase Postcard Stamps

You can buy postcard stamps at most USPS locations, online via USPS.com, or through authorized retailers. Buying online or in bulk can save trips to the post office and help you prepare for future mailing needs.

How to Affix Postcard Stamps Properly

Place the postcard stamp in the upper right corner on the address side, exactly as you would a letter stamp. Ensure the postcard is not folded or bent in a way that obscures this area. This ensures automated sorting equipment can quickly scan and process the postage.

Planning for Future Postcard Stamp Price Changes

USPS Postage Increase Schedule

USPS typically reviews and updates postage rates twice a year, usually in January and July. This semi-annual review allows the USPS to address rising operational costs and inflation, which means postcard stamp prices may continue to rise predictably through at least 2027.

How to Stay Ahead of Price Changes

Experts recommend purchasing postcard stamps in advance or buying Forever Stamps equivalent for postcards, although Forever Stamps are primarily for letters. Some mailers also explore digital postage solutions, such as printing exact postage rates online, to accommodate precise mailing needs without overpaying.

Common Questions About Postcard Stamps

Can I Use a Regular Stamp for a Postcard?

Yes, you can use a First-Class Mail Forever stamp on a postcard, but it means paying letter postage instead of the lower postcard rate. This is common when postcards exceed standard size or weight.

Are Postcard Stamps Valid Forever?

Postcard stamps bought now remain valid for future use as long as USPS policies don’t change. Like Forever stamps for letters, postcard stamps retain their value regardless of future price increases, protecting your investment.

Understanding postcard stamps and their pricing in 2025 is crucial for anyone who regularly sends postcards. From knowing the exact cost of postage to ensuring your postcard meets USPS size and weight requirements, these details help you avoid extra fees and delays. For smoother mailing experiences, make sure to purchase the correct postcard stamps and stay updated on USPS rate changes. Explore our resources to learn more about the best mailing practices and stay ahead with your postcard stamps.