These four previously-unannounced triangular stamps will be issued on May 26, the fourth day of Boston 2026.

From the USPS:

These stamps recognize Postcrossing for highlighting the fun of receiving real, personalized mail and promoting greater understanding across countries and cultures. Since 2005, Postcrossing has inspired more than 805,000 people in more than 200 countries and territories to send more than 85 million postcards to eager recipients around the world. These stamps may be used to send a postcard or letter from the United States to any country to which First-Class Mail International service is available. These stamps will have a postage value equivalent to the price of the single-piece First-Class Mail International first-ounce machinable letter at the time of use. Issued in panes of eight, these triangular stamps’ colorful illustrations by Jackson Gibbs playfully acknowledge the great distances postcards often need to travel and the efforts of the dedicated workers who help them reach their far-off destinations. Antonio Alcalá, an art director for USPS, designed the stamps.

Updates will be posted below the line with the most recent at the top.

Updated April 20^th:</strong
Here are the first-day postmarks for this issue:The Digital Color Postmark measures 2.3″ x 1.50″The Pictorial Postmark measures 2.7″ x 1.2″The “special” postmark measures 2.2″ x 1.2″

Updated April 15^th:
On May 26, 2026, in Boston, MA, the United States Postal Service® will issue the Postcrossing Global Forever® International rate stamp, in four designs, in a pressure-sensitive adhesive (PSA) pane of 8 stamps (Item 582300). These stamps will go on sale nationwide May 26, 2026, and must not be sold or canceled before the first-day-of-issue. The Postcrossing Global Forever® International rate pane of 8 stamps must not be split and the stamps must not be sold individually.

These stamps recognize the Postcrossing website for highlighting the fun of receiving real, personalized mail and promoting greater understanding across countries and cultures. Since 2005, Postcrossing has inspired more than 805,000 people in more than 200 countries and territories to send more than 85 million postcards to eager recipients around the world. These stamps may be used to send a postcard or letter from the United States to any country to which First-Class Mail International® service is available. These stamps will have a postage value equivalent to the price of the single-piece First-Class Mail International first-ounce machineable letter in effect at the time of use. Issued in panes of eight, these triangular stamps feature colorful illustrations by Jackson Gibbs. Antonio Alcalá served as designer and art director.

Automatic distribution

Special postmark

How to Order the First-Day-of-Issue Postmark:
The first-day-of-issue postmark is a postmark notating the day a stamp is first authorized for use by the Postal Service. Customers have 120 days to obtain the first-day-of-issue postmark by mail. All requests for first-day-of-issue postmarks (Traditional or Digital Color Postmark) must be sent to the following address with the choice of Traditional or Digital Color Postmark identified. All orders must be postmarked by September 26, 2026.

FDOI – Postcrossing Stamps
USPS Stamp Fulfillment Services
8300 NE Underground Drive, Suite 300
Kansas City, MO 64144-9900

The Technical Specifications are not yet available.