On May 26, 2026, at the Boston World Exposition, the U.S. Postal Service did something it has only done twice before in its entire history: it issued a triangular stamp. Four of them, actually — and they weren’t issued for just any occasion. They were issued to honor Postcrossing, the postcard-exchange project that has quietly become one of the largest mail-based communities in the world.

If you collect Forever Stamps, follow Postcrossing, or both, this release deserves its own page in your notes. Here’s everything worth knowing about it.

What Are the USPS Postcrossing Stamps?

The Postcrossing stamps are a set of four triangular Global Forever stamps, released May 26, 2026, at the 2026 Boston World Exposition as part of the show’s letter-writing theme day. Each is valued at the international postage rate ($1.70 at time of issue) and sold in a pane of eight, with four different designs in the mix. USPS printed 20 million of them.

They were designed by Antonio Alcalá, a longtime USPS art director who previously served on the Postmaster General’s Citizens’ Stamp Advisory Committee, and illustrated by Jackson Gibbs, whose bright, playful style gives the stamps an energetic, almost storybook feel. The four scenes depict mail making its way to its destination in unlikely ways — on horseback, underwater, into space, and by motorcycle — a small, colorful nod to just how far a single postcard can travel before it lands in someone’s mailbox.

Some stats: in 2025 alone, Postcrossing members collectively sent postcards a combined distance of more than 16 billion miles — farther than Voyager 1, the most distant human-made object in space. It’s a fitting bit of trivia for a stamp designed entirely around distance.

Why Triangles?

Shape is rarely an accident on a USPS stamp, and this one wasn’t either. The Postcrossing stamps are only the third triangular stamp issuance in Postal Service history — the first was a pair of stagecoach and clipper ship stamps in 1997, and the second commemorated Jamestown’s 400th anniversary in 2007. That’s a genuinely short list to join.

Alcalá has said the unusual shape was partly meant to make the U.S. stamp stand out on postcards arriving from other countries — something he pays close attention to himself as a longtime postcard sender. It’s also a practical nod to Postcrossing culture specifically: a triangular stamp fits neatly into the corner of a postcard, leaving the rest of the space free for a message and address.

The Backstory: A 15-Year Community Campaign

This wasn’t a stamp USPS dreamed up on its own. Members of the Postcrossing community had petitioned the Citizens’ Stamp Advisory Committee for years asking for an official U.S. Postcrossing stamp before this set was finally approved — and the timing lines up with something bigger.

The very first official Postcrossing stamp anywhere in the world was issued by PostNL in the Netherlands back in October 2011. In the years since, postal authorities across more than a dozen countries — including Finland, Austria, Switzerland, Ireland, Hungary, Brazil, Luxembourg, Estonia, and Germany — have issued their own. The U.S. was a comparatively late arrival to a tradition that’s been building globally for over a decade.

That context matters: this stamp isn’t just a nice USPS design choice, it’s the U.S. finally joining a worldwide philatelic tradition built by the Postcrossing community itself.

The First Day of Issue Postmark, First Day Covers & Maxicards

Like most major USPS releases, the Postcrossing stamps got a proper first-day treatment — and this one has a few extras worth knowing about if you’re a completionist collector.

The stamps were officially issued on May 26, 2026, in Boston, MA 02205, at the Boston World Exposition, which is the city and date that appears on the official First Day of Issue postmark. Any Postcrossing stamp you get hand-cancelled with that postmark (or that you order pre-cancelled from USPS) carries that Boston date and location permanently.

USPS released two dedicated collectible products alongside the stamps themselves:

• Postcrossing First Day Covers (set of 4): Each is a classic #6¾ collectible envelope with one of the four Global stamps affixed and cancelled in black with the official First Day of Issue postmark. These are collector’s items only — the cancellation voids the stamp for actual mailing, so they’re meant to be kept, not sent.
• Postcrossing Maxicards (set of 4): A maxicard (or “maximum card”) is a postcard where the stamp, the postmark, and the image on the card all relate to the same theme — a favorite format among thematic collectors. USPS’s Postcrossing Maxicards pair each of the four oversized (8″ x 6″) postcards with a matching Global stamp cancelled with the First Day of Issue postmark, and the set includes four additional loose Global stamps as well, so you have spares to actually use.

If you collect first-day materials as part of your Forever Stamp hobby, the Maxicards in particular are worth grabbing early — thematic sets like this tend to sell out once a release generates buzz, and this one already has, thanks to the triangular novelty.

Where to Buy Them (and a Fair Warning)

Officially, the Postcrossing stamps are available at Post Office locations nationwide, through USPS Store, by phone, or by mail through USA Philatelic. In practice, availability has been a little uneven — some buyers have reported that their local post office simply hadn’t stocked them, since individual branches place their own stamp orders rather than receiving new releases automatically. If your local branch comes up empty, ordering directly through usps.com is the more reliable route.

One Limitation Worth Knowing

These are Global Forever stamps, which means they’re priced and intended for international postage — sending a postcard or letter abroad. They’re not valid at the cheaper domestic postcard rate, and at least a few Postcrossing members have publicly wished for a U.S.-rate version as well, since plenty of Postcrossing mail goes between members within the United States. For now, if you’re mailing domestically, you’ll still want your regular Forever Stamp stock on hand — the Postcrossing design is specifically for cards and letters heading overseas.

How to Use Them Well

• Place the stamp in the corner of your postcard — the triangular shape was designed with exactly that placement in mind.
• Since there are four different designs, you won’t send (or receive) the same one twice in a row — worth mentioning to your recipient, since collectors on the receiving end may appreciate knowing which of the four they got.
• Pair them with your outgoing Postcrossing cards specifically; save your standard Forever Stamps for domestic mail, since the Postcrossing set only covers the international rate.

Frequently Asked Questions

Are the Postcrossing stamps Forever stamps?
Yes — specifically Global Forever stamps, meaning they always cover the international rate at the time of use, even if postage prices rise later.

Can I use them to mail within the United States?
No. They’re priced for international postage. For domestic mail, use standard Forever Stamps.

How many designs are there?
Four, sold together in a pane of eight.

Is the United States the first country to issue a Postcrossing stamp?
No — the Netherlands issued the first official Postcrossing stamp in 2011. Numerous countries have issued their own in the years since, with the U.S. joining in 2026.

Where can I buy them if my local post office doesn’t have them?
Order directly through https://store.usps.com/store to avoid relying on individual branch stock.

What’s a maxicard?
A maxicard (or “maximum card”) is a postcard where the stamp, the postmark, and the postcard’s image all share the same theme. USPS’s official Postcrossing Maxicards pair each stamp design with a matching postcard, cancelled with the First Day of Issue postmark.

Can I still use a First Day Cover to mail something?
No — the First Day of Issue postmark cancels the stamp, so First Day Covers are collector’s items only, not valid for mailing.