A millimeter (mm) is a unit of length in the International System of Units (SI), equal to one thousandth of a meter, or 0.001 meters. It is used to measure small lengths and is exactly equal to 0.03937 inches (approximately 5/127 inches).
To contextualize the size:
- 10 millimeters equal 1 centimeter.
- 1000 millimeters equal 1 meter.
- One millimeter is the smallest unit commonly marked on metric rulers.
Thus, a millimeter is very small, typically used for precise measurements of small objects or distances.
