There were 25 sheets with 15 stamps each (see larger picture). The stamp sheet is signed by the artist John Slavney and hand written "1st edition (x/25)" with a stamp from printer "Printed by Foliotrope Chicago" A single stamp is 1.125x1.625. There has never been a 2nd edition to date. The artist was selling these on eBay and got into trouble since these are not official and quit selling them. Someone bought the first one (1/25) on eBay and after the artist was shutdown, he bought the last 13 sheets from him and passed them out on poster people. Anyway, as a bonus, the artist sent him about 10 extra sets of 3 which is why you see singles floating around. So the story does not tell the tale of the other 11 sets, which may have been sold at the show, bought by other people, or just passed out to phriends. A few others are believed to have been sold on eBay. These may not be posters, but they are rare and very popular!