Millimeter

A metric unit that equals one-thousandth of a meter, here are some measurements of American coins to give you a sense of scale as you read through the item descriptions.

Dime: A scant 18mm in diameter, just less than 1.5mm thick.

Penny: A scant 19mm in diameter, 1.5mm thick.

Nickel: A little more than 21mm in diameter, a scant 2mm thick.

Quarter: A little more than 24mm in diameter, a scant 2mm thick.