The base (SI) unit is meter.
For measuring length/distance, meter is used. Other units are km / cm/ mm.
The meter.
Base units need not have ANY volume. A second is the base unit for measuring time and it has no volume!
It is s units on some unspecified scale for measuring length.
For units of length, metre. For a measuring device, meter.
It is the meter.
Metre
SI unit of length is "meter".
They both measure the length of a material. They just have different units and conversions.
The base unit for length is the metre, the base unit for mass is the kilogram.
49.5 units
Surface area is measured in square units.