Revolution is an amazing toy. It's a top, but not. It uses magnets in the body and in an included base. When you put the Revolution on it's base with the tip against a piece of glass at one end, the magnetic fields support the Revolution causing it to float. With a simple twist, the Revolution can continue spinning horizontally for 20 minutes. Diameter = 1 1/4 inches, Length = 5 3/8 inches. Base width = 3 1/8 inches, Base Length = 4 3/8 inches, Base Height = 1 3/8 inches.