ACEO stand's for  ART CARDS EDITIONS and ORIGINALS  which are traded and sold through various ways.   They must be 2 1/2"  X  3 1/2"  to be an ACEO.  The one's here were painting in Germany.  These may all be bought as a signed  print for $8.00 each.  Purchase through Paypal under  To let me know which one, count to the one you want. Sorry, that's the best I can do at the moment.