The stamps will feature 10 different Peanuts character designs, and each sheet will have 20 stamps (two sets of the 10 designs). Like all first class US stamps released in recent years, they will be "forever" stamps, always good for mailing a first class letter regardless of future price increases.
This is the third time the USPS has issued stamps celebrating Peanuts - the first was a Snoopy "flying ace" stamp in 2001, and the second was a set of stamps celebrating "A Charlie Brown Christmas" in 2015.
The official release and first day ceremony for the new Schulz centennial Peanuts stamps will take place at the Charles M. Schulz Museum in Santa Rosa, California on Friday September 30. The event is free; for details see the Museum website and this USPS announcement.
You should be able to buy the new stamps at your local post office, or they can also be ordered online from the USPS website.
In addition to the stamps themselves, you can also order a variety of related merchandise at the USPS website - such as first day covers, a stamp pin, collectible stamp stationery sets and portfolios, "field notes" notebooks, and a 48-page book reprinting a variety of mail-themed Peanuts strips.
