ATC2 is a group of artists who make original collectable trading card art that is for sale on ebay. Art Trading Cards have been around for years, however, ATC2s are the next generation of this popular form of art. These cards are done in a variety of formats and media, however, the most common ATC2 size is 3.5x 2 horizontal or vertical the same size as a common business card. This makes ATC2s super easy to collect and store. You can keep them in a business card holder or rolodex or a trading card album. Once you buy them from the artist you can collect or trade them with friends! Collecting Artist Trading Cards is easy and fun! What a great way to become an art collector or increase your current art collection-look for ATC2s on ebay.