Unlike handbills which were literally handed out, postcards were mailed to the attendees on the mailing list as well as music industry staff. It is still very common to find postcards with the addresses on them. Many postcards were never mailed. Some collectors prefer mailed postcards and others prefer them in their original state. Postcards are more durable as they were printed on card stock in a typical 7 1/2” x 4” size.