ACEO stands for Art Cards, Editions & Originals referring to miniature collectible artworks, typically 2.5" x 3.5" (the size of a trading card), that can be one-of-a-kind originals or limited prints, allowing affordable collecting of diverse art styles. These pocket-sized masterpieces are created with any medium, from watercolor to mixed media, and are popular for framing, collecting in albums, or as unique gifts, stemming from the original Artist Trading Card (ATC) concept.