It is 10 mm thick.
A US quarter is 1.75 mm thick. Canadian quarters are 1.58 mm thick.
It is three times as tall, or two nickels taller. In absolute terms, it's 3.9 mm taller: US nickels are 1.95 mm thick so two of them are 2x1.95 = 3.9 mm thick.
It is, in fact, 1.75 mm thick, not 2 mm. So any reasons which tried to explain why it is 2 mm thick would be contradicted by reality!
.1406 inches or 3.57 mm thick. (USG)
19 gauge steel is 1.11 mm thick and 20 gauge is .953 mm thick.
In Imperial standard (swg), 16 g is 0.064" (1.63mm) thick.
0.405 mm.
.76- .83 mm thick
Probably 25 gauge, which is .556 mm thick. However, 26 gauge is close too, it is .478 mm thick.
40 mm = 1.575 inches 40 mm = 4 cm
It is .478 mm thick.