The ultimate multimedia surface! Ultra-smooth, highly absorbent clay surface is great for alcohol inks, acrylics, markers, graphite, collage and much more. Small, 3-1/2 x 3-1/2" boards are the perfect size to make a series of artwork on a specific theme. Also terrific for etching projects. Feature a strong, hardboard backing. Boards are 1/8" thick. 4 per package.