Not sure what your monitor size is ?
Monitor Size: Unknown
Australian 2 dollar coin
Hong kong 10 cent coin
50 euro cent coin
Pakistan 5 rupee 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