The diameter of coin money should be sized according to its represented value. Thus, the $1 coin would be the largest diameter, followed by the quarter, then the dime, the nickel, and finally the penny.

Also, coins should not have ‘coin orientation’ but ‘medallic orientation’, meaning that they should be designed so that their front and back sided are oriented in the same direction, just like the pages of a book. Thus, both sides should be oriented in the same direction when a coin is flipped over along its vertical axis.