The same tool as the Colour Wheel but in a compact, convenient size!
Colour Wheel features: Primary Color Mixtures, Tints and Tones, Complementary Harmonies, Warm and Cool Colors, Gray Scale, Personal Palette Color Harmonies Terms and Definitions.
Diameter 13.0 cm (5-1/8")
Also available are a full sized version, a handy pocket guide and a full size Water colour wheel.