What are ACEO's or Sketch Cards? ACEO (short for "Artist Card Editions & Originals") was the brainchild of "bone*diva" on ebay back in 2004-ish. These are 2.5x3.5 inch (standard baseball card size) original works of art. The Non-Sports Trading Card Industry wanted in on the action but because 'Bone*diva' has ACEO as a registered trademark, they calls their version of these: 'Sketch Cards'.