The Quiller Palette, designed around the color theories of noted artist Stephen Quiller, provides wells for primary, secondary and intermediate colors, as well as twelve extra wells for additional colors. It has a large central mixing area and outside wells for gouache or earth colors. The Quiller Palette comes with valuable information on how to organize your palette for optimal color relationships and is an essential tool for the watercolorist looking for convenience. Measures 14-3/4″ x 14-3/4″ x 7/8″.