This Cavallini 1000 piece Vintage Puzzle features a chart of The Natural System if Colours - a classic Color Wheel. Used to show how to mix colors starting with only red, yellow and blue, the color wheel is a standard tool for artist and designers. The puzzle pieces are packaged inside a muslin bag within in a 10 inch decorative tube. The finished puzzle measures 20 x 28 inches. A nice gift for any artist, color theorist, or puzzle enthusiast.