Strathmore 105904 Watercolor Cold Press Strathmore Artist Trading Cards, 2.5-Inch by 3.5-Inch, 10-Pack
Strathmore Artist Trading Cards- Artist trading cards (ATCs) are miniature pieces of art that are traded around the world. Artists create, trade and collect art at organized "swap" events, either in person or online. The only official rule for ATCs is the size: 2.5" x 3.5".