This issue was announced by the USPS on December 13^th:

The bold artwork on a skateboard deck is often as eye-catching and individualistic as a skater’s most breathtaking moves. These four stamps celebrate the Art of the Skateboard with vibrant designs that capture skateboarding’s excitement. Art director Antonio Alcalá designed the stamp issuance using photographs of skateboards created by artist Crystal Worl, an Alaskan whose blue and indigo salmon formline design expresses her Tlingit/Athabascan heritage; self-taught artist William James Taylor Jr. of Virginia, who created an energetic red and orange graphic abstraction; Di’Orr Greenwood of Arizona who represents her Navajo culture with a turquoise-inlaid skateboard that features eagle feathers and colors of the rising or setting sun and Colombian-born, Washington, DC-raised muralist MazPaz (Federico Frum), who painted a stylized jaguar.

We will post additional information as we get it below the line, with the most recent information at the top.

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Updated May 1^st:
Here are the Scott catalogue numbers for this issue:

5763 Tlingit Athabascan Salmon Design by Crystal Worl
a. Imperforate
5764 Abstract Design by William James Taylor
a. Imperforate
5765 Navajo Design by Di’Orr Greenwood
a. Imperforate
5766 Jaguar Design by MasPaz (Frederico Frum)
a. Imperforate
b. Horiz. or vert. strip of 4, #5763-5766
c. Imperforate horiz. or vert. strip of 4, #5763a-5766a

Updated February 23^rd:
Here are the first-day postmarks for this issue:The Digital Color Postmark for this issue measures 2.61″ x 1.50″The Pictorial Postmark measures 2.36″ x 1.22″

From the Postal Bulletin:
On March 24, 2023, in Phoenix, AZ, the United States Postal Service® will issue the Art of the Skateboard stamps (Forever® priced at the First-Class Mail® rate) in four designs, in a pressure-sensitive adhesive (PSA) pane of 20 stamps (Item 483400). These stamps will go on sale nationwide March 24, 2023, and must not be sold or canceled before the first-day-of-issue. The Art of the Skateboard commemorative pane of 20 stamps must not be split and the stamps must not be sold individually.

With four new stamps, the Postal Service celebrates the “Art of the Skateboard.” The bold designs featured on the pane of 20 stamps capture the excitement of skateboarding and reflect the diverse creators of these artistic decks:

• A blue and indigo salmon design expresses one artist’s Tlingit/Athabascan heritage.
• A striking red and orange graphic abstraction by a self-taught Virginia artist energizes another skateboard.
• Another represents Navajo culture, featuring a turquoise-inlaid skateboard that displays eagle feathers and the colors of the rising or setting sun.
• A design featuring a stylized jaguar painted in black, white, and gold is by a Colombian-born, Washington, DC-raised muralist.

Art director Antonio Alcalá designed the stamp issuance, using photographs of skateboards created for these stamps by, respectively, Crystal Worl, William James Taylor Junior, Di’Orr Greenwood, and MasPaz (Frederico Frum).

Item 483400, Pane of 20: No automatic distribution.

How to Order the First-Day-of-Issue Postmark:
Customers have 120 days to obtain the first-day-of-issue postmark by mail. They may purchase new stamps at their local Post Office™ or at The Postal Store® website at store.usps.com/store/home. They must affix the stamps to envelopes of their choice, address the envelopes (to themselves or others), and place them in a larger envelope addressed to:

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

After applying the first-day-of-issue postmark, the Postal Service will return the envelopes through the mail. There is no charge for the postmark up to a quantity of 50. There is a 5-cent charge for each additional postmark over 50. All orders must be postmarked by July 24, 2023.

Technical Specifications:

Issue: Art of the Skateboard Stamps
Item Number: 483400
Denomination & Type of Issue: First-Class Mail Forever
Format: Pane of 20 (4 designs)
Series: N/A
Issue Date & City: March 24, 2023, Phoenix, AZ 85026
Art Director: Antonio Alcalá, Alexandria, VA
Designer: Antonio Alcalá, Alexandria, VA
Artist: Crystal Worl
Artist: William James Taylor Junior
Artist: Di’Orr Greenwood
Artist: MasPaz (Frederico Frum)
Modeler: Sandra Lane / Michelle Finn
Manufacturing Process: Offset
Printer: Banknote Corporation of America
Press Type: Gallus RCS
Stamps per Pane: 20
Print Quantity: 18,000,000 stamps
Paper Type: Phosphor Tagged Paper, Block
Adhesive Type: Pressure-sensitive
Colors: Cyan, Magenta, Yellow, Black, Cool Gray 5C, Pantone 7688C, Pantone 172C, Pantone 715C, Pantone 7684C
Stamp Orientation: Horizontal
Image Area (w x h): 1.42 x 0.84 in / 36.068 x 21.336 mm
Overall Size (w x h): 1.56 x 0.98 in / 39.624 x 24.892 mm
Full Pane Size (w x h): 7.24 x 5.92 in / 183.896 x 150.368 mm
Press Sheets Size (w x h): 21.72 x 11.84 in./ 551.688 x 300.736 mm
Plate Size: 120 stamps per revolution
Plate Number: “B” followed by nine (9) single digits
Marginal Markings:
Front: Plate number in four corners of the pane
Back: ©2022 USPS • USPS logo • Two barcodes (483400) • Plate position diagram (6) • Promotional text

Updated February 7^th as predicted here a month ago:
[ceremony details] [click on any of the pictures for larger versions]
USPS Skateboard Stamps To Debut at PHXAM 2023

What: The U.S. Postal Service will hold a dedication ceremony for four new stamps celebrating the Art of the Skateboard at Cowtown’s 21st annual Phoenix Am contest.

The first-day-of-issue event is free and open to the public. News of the stamp is being shared with the hashtag #ArtoftheSkateboardStamps.

Who: The Honorable William Zollars, member, USPS Board of Governors

When: Friday, March 24, 2023, at 11 a.m. MST

Where: Desert West Skate Plaza
6602 W. Encanto Blvd.
Phoenix, AZ 85035

RSVP: Dedication ceremony attendees are encouraged to rsvp at: usps.com/artoftheskateboard.

Background: Fiercely independent and often rebellious, the skateboarding subculture crackles with raw creative energy. The bold artwork emblazoned on a skateboard deck is often as eye-catching and individualistic as a skater’s most breathtaking moves.

These four stamps celebrate the Art of the Skateboard with vibrant designs that capture skateboarding’s excitement and reflect the diversity and influences of the four artists whose work is featured:

Crystal Worl, an Alaskan artist used a blue and indigo salmon formline design to express her Tlingit/Athabascan heritage.

William James Taylor Jr, a self-taught Virginia artist created an energetic red and orange graphic abstraction.

Federico “MasPaz” Frum, a Colombian-born, Washington, D.C.-raised muralist painted a stylized jaguar.

Di’Orr Greenwood, of Arizona represented her Navajo culture with a turquoise-inlaid skateboard that features eagle feathers and colors of the rising or setting sun.

Art director Antonio Alcalá designed the stamp issuance, using photographs of skateboards created for these stamps.

The Art of the Skateboard stamps are denominated as Forever stamps and will always be equal in value to the current First-Class Mail 1-ounce price.

Updated January 10^th:
These stamps will be issued Friday, March 24, in Phoenix. The “welcome” events for PHXAM (some sort of skateboard competition) begin on that date at the Desert West Skateboard Plaza. The PHXAM website never actually tells what the event is or what the acronyms stand for.