ACEO - Art Cards, Editions & Originals This is an ACEO that I just created. If you don't know what an ACEO is, they are mini pieces of art that you can purchase on eBay. You can search for ACEO to see all the different artist's artwork. The size of the artwork is 2 1/2" x 3 1/2", the same size as a baseball trading card. If you want to see more of my artwork that I have for sale on eBay, just click on the eBay Auctions Link on the left hand side of my blog, that will go to a page of what I currently have for sale.