Vogue UK website.
According to the short article, offbeat UK fashion label The Rodnik Band has teamed up with Peanuts to create a line of womenswear featuring our favorite characters on t-shirts, dresses, and accessories. The clothes go on sale in the UK in the fall. Visit the Vogue UK website to read the article, titled "Snoopy's Fashion Comeback," and be sure to view the gallery and see all the pictures.
UPDATE November 30, 2013: Elle UK reports that the clothes are now available for a limited time at Selfridges (both in store and online, apparently).