This miniature painting is an original acrylic on 140lb professional acid-free paper. The image is 3.5 inches by 2.5, and I have retained a .5 inch unpainted border, to facilitate framing. I have glazed the surface of the image, which protects it, and gives the appearance of an oil painting. The painting is signed by the artist, Fran Caldwell (me) on the border, and the back is also signed, should you want to trim the picture to ACEO size. It comes with a Certificate of Authenticity from EBSQart, where I am a member.