Approximately 13cm wide and 16cm tall. There are 8 colors, and it lights up in various colors. Color: Blue. Requires 4 batteries (AAA). Operation Instructions (see the 7th photo): Button A lights up yellow. Press the button again to turn off the light. Button B lights up in various colors. Press the button again to turn off the light. The color changes each time you press it. Button C rotates the mechanism, so the starry sky appears to rotate. Please note that there may be errors in the operation instructions. Negotiations for price reduction may not be possible. Please feel free to ask any questions you may have ^o^