While getting organize for my first art show last spring, I quickly ordered online twenty 5 x 7 mat sets so that I could sell prints of my work. Much to my surprise, when they arrived they were actually 5 x 7 frames with ACEO openings about 2" by 3" meant for macro photography. Well, sending them back was a hassle and costly. I threw them aside in my studio. While printing some images, that were small, I realized that I could create little card-like art. I have sold a few immediately during the next art show and have worked my way through half of my stash!