ATCs (Artist Trading Cards) are miniature works of art about the same size as modern baseball cards, or 2½ x 3½ inches.
This is a little nice thing for beginners to start with, but also something fun for the more experienced crocheter, as well as a very welcome gift. Crocheting one picture and stitching it onto a card takes about 60 minutes.
These are very popular for birthdays, but can also be used for other occations, such as Christmas, condoleanses, weddings and much more.
In October 2013, there were a total of 30 different motifs for the cards.