# How Long is 1 Millimeter? Definition and Real-Life Examples

A millimeter (abbreviated as "mm") is a unit of length in the metric measurement system that is equal to one thousandth of a meter.

1 millimeter  = (1/1000) meter or 1 meter = 1000 millimeters

The millimeter is used to measure things that have small lengths

## Things That Can Have a length of Approximately 1 Millimeter

• The thickness of about 10 sheets of copy paper since each paper has a thickness of 0.1 mm
• The thickness of a finish nail used in construction
• The thickness of the lead of a pencil (shown above)
• The thickness of a grain of rice
• The thickness of a sewing needle
• The thickness of about 20 hair strands if each hair strand measures 0.05 millimeters.
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