Special Editions" are quality signed prints individually signed by the artist. Each Chart depicting the nervous system has been faithfully reproduced on high-resolution film for color integrity and light fastness. "Wired"is a limited edition of 500. All other Special Editions are "open editions" and are indicated as A/P (Artist Proof). As with all prints, to aviod sun damage place out of direct sunlight Measures- 17" x 23"