ACEO, ATC, whatever you call them- they are fun to paint! These papers are 2.5 X 3.5 inches. They just seem like pure fun to paint since you don't have a large piece of watercolor paper in front of you waiting to turn into a "serious" painting. I have also been trying out the canvas ACEO papers for oil paints. I have been seeing many artists on Etsy putting these tiny paintings in their shops and decided to give them a try. I painted more of them, but didn't want to post too many at once, so will post more later. I found some small frames just the right size for them, and if you are like me, you probably like your paintings more once they are matted or framed. The small size is also just right for painting two of my favorite subjects- wine corks and sea shells!