ACEOs (Art Cards Editions and Originals) or ATCs (Art Trading Cards) are miniature works of art about the same size as modern baseball cards or 2 ½ X 3 ½ inches (63 mm X 89 mm), small enough to fit inside standard card-collector pockets. Cards are produced in various media, including dry media (pencils, pens, markers, etc.), wet media (watercolor, acrylic paints, etc.), paper media (in the form of collage, papercuts, found objects, etc.) or even metals or cloth.