Many people asking about what is an ACEO, then I decided to tell about it as much as I can...
ACEO stands for Art Cards, Editions and Originals.
ACEOs are fixed sized art pieces just like baseball cards. They must be 2,5x3,5 inc no matter what kind of art it is... It may be print, original painting, photograph, and sketch or collage... They may be paper, metal, cloth, wood… There is no limit, no rule except the size.

ACEOs are the best way to collect art, because they are economical, they are tiny and cute !
There are many way to display these little gems, you may display in an album as stamp collectors, you may frame them, or you may display with mini easels like your mini art gallery.
I print my ACEOs on Epson Heavy weight matt papers with pigment inks to ensure the life of the prints. I also print certificate of authenticity on the back of each ACEO, this includes, name of the artwork, date, number and the artist sign. I also send my ACEOs with free mini wood-like easel. You may see them here.
There are many artist who selling their art as an ACEO, you may Google it or ETSY it for more information and more ACEO art.