The size of 10nm and a mole of atoms

A nanometer is decidedly a very, very small unit of measurement. To help visualize just how small that is 10nm is roughly equivalent to the size of a cell wall.

Contrasting to the very small some units of measurement are quite vast and are also difficult to visualize, for example, one mole of atoms. A mole is corresponds to a value of 6.022*10^23 of something. To help put that in perspective if you took all of the water on the planet (in gallons) and multiplied it by 100 you would have roughly 1 mole of water (in gallons).