What is the diameter of a half dollar in centimeters?

Answer 1

There are more than 20 currencies called the "dollar" around the world, and each uses their own coinage which almost invariably includes the half-dollar.

In general, the half-dollar coin is between 1.5 and 2.5 centimetres (3/5" and 1") in diameter. A list of every currency and the size of the coin used may be added at a future time.