Not sure what your monitor size is ?
Monitor Size: Unknown
American 50 golden eagle
New zealand 1 dollar coin
New zealand 20 cent coin
British 2 pound coin
tiny bit smaller
It is almost similar to Singapore 10 cents coin
perfect at 18.5
It is perfect with a 20'' monitor.
Also Avalible At:http://pective.com/pic/3d-real-life-penny