ACEO "STEAMPUNK GUY" ~Vicki at www.artwanted.com/njbeanie24 . The acronym "ACEO" stands for Art Cards, Editions and Originals. They can be original art, print editions or photographs. The majority of ACEOs are two dimensional, but three dimensional elements may also be incorporated. Pop-ups, books, collages, and sculpture can all be ACEOs as long as they measure 2-1/2" x 3-1/2"