Yes, 3/8ths of an inch is .9525 centimeters.
But close enough for government work. ;-)
So the one cent coin or penny should be about half the size and thickness of the dime and made of pure copper.
The present penny is 19 mm in diameter, 1.55 mm thick, and 2.5 grams.
The present dime is 18 mm in diameter, 1.35 mm thick, and 2.3 grams.
The penny should be 10 mm in diameter, 1.00 mm thick, and 0.7 grams.
Such a one cent copper coin would have 0.5 cent of copper at $3 per pound.
Then the nickel could be smaller — midway between the dime and penny.
So our smallest change would make sense! ;-)
But close enough for government work. ;-)
G R O A N ! ! !
LOL! Perfect!!!