Oil on fine grain canvas on wood ACEO.
2.5 inches x 3.5 inches. The above photo shows actual size.
Call me crazy, but I love to do tiny miniatures. For reference I used photos, clay models, and did some out of my head. On a miniature face, you have to get the eyes lined up EXACTLY, because if it's off even a fraction of an inch, it shows. Below you can see an enlarged detail shot with a US penny for size reference.