NOW 15% OFF! Leisure Arts, Let's Trade Artist Trading Cards. 64 page book. The newest craze- Artist Trading Cards are handmade, little miniature works of art to create on 2 1/2" x 3 1/2" cardstock. They are embellished with a variety of techniques and exchanged or traded with other artists. There are 63 examples of ATC's to inspire you, with 33 background techniques to get you started. There is also 5 pages of ephemera to cut and use.