Tailor Shape Colors are inspired by traditional Tailor's chalk in their shape and size. They are a pigmented Graphite block, from the ArtGraf line of water-soluble drawing media. Use wet or dry to produce a wide range of shades from light to opaque. Colors are blendable - mix with other ArtGraf colors. Handmade in Portugal by the Viarco company. This set of 3 monochromatic colors come in a flat cork holder. Each block measures 1.75 x 2 inches.