|How small is a nanometer?
It's defined as one billionth of a meter. How small is that?
Some ways to think about just how small a nanometer is:
A sheet of paper is about 100,000 nanometers thick.
Blond hair is probably 15,000 to 50,000 nanometers in diameter,
but black hair is likely to be between 50,000 and 180,000
There are 25,400,000 nanometers in an inch.
A nanometer is a millionth of a millimeter