Updated December 7th: Scott Catalogue numbers:
5031 (49¢) Geometric Snowflakes – purple & lilac snowflake
5032 (49¢) Geometric Snowflakes – dark blue & blue snowflake
5033 (49¢) Geometric Snowflakes – dark green & green snowflake
5034 (49¢) Geometric Snowflakes – dark red & pink snowflake
a. Block of 4, #5031-5034
b. Convertible booklet pane of 20, 5 each #5031-5034
c. As “a,” imperforate
d. As “b,” imperforate

Updated September 25th: The first day Digital Color Postmark.
This DCP measures 2.64″x1.23″. The black-and-white postmark has been changed to the standard four-bar FIRST DAY OF ISSUE cancel.

Updated September 21st:
On October 23, 2015, in New York, NY, the U.S. Postal Service® will issue Geometric Snowflakes (Forever® First-Class Mail® priced at 49 cents) in four designs, in a pressure-sensitive adhesive (PSA) booklet of 20 stamps (Item 680400).

The stamps will go on sale nationwide October 23, 2015.

Celebrate the joys of a winter snowfall with Geometric Snowflakes, four colorful new stamps issued in a booklet of 20. Each new stamp depicts a different snowflake drawn in one of four colors: purple, pink, green, or blue. These bright, cheerful stamps are sure to add a whimsical splash to holiday cards, thank-you notes, invitations, greeting cards, and any mailing that calls for a touch of warmth during the coldest months of the year. Art director Antonio Alcalá and Leslie Badani designed the stamps.

How to Order the First-Day-of-Issue Postmark:
Customers have 60 days to obtain the first-day-of-issue postmark by mail. They may purchase new stamps at their local Post Office, at The Postal Store® website at http://www.usps.com/shop, or by calling 800-782-6724. They should affix the stamps to envelopes of their choice, address the envelopes (to themselves or others), and place them in a larger envelope addressed to:

Geometric Snowflakes Stamps
Special Events Coordinator
380 West 33rd Street
New York, NY 10199-9998

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 December 22, 2015.

There are seven philatelic products for this stamp issue:

• 680406 Press Sheet with Die-cut, $58.80.
• 680408 Press Sheet without Die-cut, $58.80.
• 680410 Keepsake (set of 4), $16.95.
• 680416 First-Day Cover (Set of 4), $3.72.
• 680421 Digital Color Postmark (Set of 4), $6.56.
• 680430 Ceremony Program (random), $6.95.
• 680431 Stamp Deck Card, $0.95.

Technical Specifications:

Issue: Geometric Snowflakes Stamps
Item Number:680400 Denomination & Type of Issue: First-Class Mail Forever
Format: Double-Sided Booklet of 20 
(4 designs)
Series: Holiday Celebrations
Issue Date & City: October 23, 2015, New York, NY
Art Director: Antonio Alcalá, Alexandria, VA
Designer: Antonio Alcalá, Alexandria, VA
Designer: Leslie Badani, Alexandria, VA
Typographer: Antonio Alcalá, Alexandria, VA
Modeler: Donald Woo
Manufacturing Process: Offset, Microprint
Printer: Banknote Corporation of America/SSP
Printed at: Browns Summit, NC
Press Type: Alprinta 74
Stamps per Booklet: 20
Print Quantity: 300 million stamps
Paper Type: Phosphor Tagged Paper, Overall
Adhesive Type: Pressure-sensitive
Processed at: Banknote Corporation of America, Browns Summit, NC
Stamp Orientation: Vertical
Image Area (w x h): 0.73 x 0.84 in./18.54 x 21.34 mm
Stamp Size (w x h): 0.87 x 0.98 in./22.09 x 24.89 mm
Full Pane Size (w x h): 5.52 x 1.96 in./140.21 x 49.78 mm
Press Sheet Size (w x h): 11.04 x 11.76 in./ 280.42 x 298.70 mm
Colors: Cyan, Magenta, Yellow, Black, Cool Gray
Plate Size: 240 stamps per revolution
Plate Numbers: “S” followed by five (5) single digits
Marginal Markings:
• Plate numbers in peel strip area 
• © 2015 USPS in peel strip area

From the USPS:
4 designs
FDOI: October 23 in New York, NY at the ASDA Stamp Show
Format: Booklet of 20

Each of the four Geometric Snowflakes stamps depicts a different snowflake. In nature, untold millions of ephemeral ice crystals form unique patterns that are as stunning in their complexity as they are fleeting. This infinite variety inspired the designers to experiment with different graphic shapes. Each snowflake is drawn in one of four colors: purple, pink, green, or blue. Applying light and dark shades of color enhanced the intricate geometry of each flake and added a feeling of playfulness to the stamp art.

Art Director: Antonio Alcalá