meter
The meter is the standard unit of measurement for length in the SI system.
The standard unit of length in the metric system is called the meter. The standard unit of mass is the kilogram.
Length is measured in meters in the metric system.
Please note that the metric system is the world-wide standard. If by "standard" you mean the Imperial system (the system commonly used in the USA), the similarities are that the systems are designed to measure, and that they both have units to measure the same type of thing, for example length/distance, area, volume, temperature, etc.
he standard unit of length in the metric system is the meter
That is the important "metre".
" meter "
metric ruler
The basic unit of length in the metric system is the meter. Grams are used to measure weight and liter is used to measure liquid capacity.
Centimeters
it is not standard
there are many instruments used to measure length depending upon the size of object , Ruler is Metric instrument used to measure length. Screw gauge is also used as an instrument used to measure length in mm.