Artist Trading Cards (ATCs) are intended as "mini" art works which can either be simple or elaborate. Card sizes are exactly 2.5"x3.5" and are made from heavy card stock (like a cereal box). Each card back features name of artist, title, date, location of artist, and if desired, contact information for the artist such as email address. Cards are traded with other artists with the intent to collect different works from artists all over the world. It's fun, meditative, relaxing and creative! These are my cards traded out to others.