it can be no bigger than a4, and it mustn't project more than 3 inches, but at the moment they are pouring into rosie headers house, and we've had stuff from japan and america already, and also from artists in the community, but anybody can enter for mail art, so if anybody's interested in a mail art sheet, i can get one for you, but those exhibitions are going up in freud's, which is our sort of festival centre for the two and a half weeks during the festival.