Each of these is 1" and each has curl text reading "©United Feature Syndicate Inc." Although with the copyright on the curl these images were produced on some type of dot-matrix printer with the images and lettering having tiny irregular lines most apparent when viewed with magnification. They are quite scarce and must have been produced in a small quantity. Characters are: Charlie Brown, Lucy, Snoopy, Linus, Schroeder, Patty, 'Pig-Pen', Violet and Shermy. High gloss and NM displaying Mint. Probably from the 1990s. Interesting, but not officially issued buttons.