ACEO stands for "Art Cards, Editions and Originals". These mini works of are being created by artists from all over the world with all types of mediums and subject matters. Anything goes as long as they are 3.5 by 2.5 inches in size (same size as a trading card). Watercolor, Oil, Acrylic, Colored Pencil, Pastels, Photography, Pen and Ink, Sketching, Collage - the sky is the limit. Every interest and subject is covered!