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.
meter stick
It's used by internal physiological mechanisms of several species of insects, fish, birds, and animals. When used by humans, we don't have those physiological mechanisms, or at least if we have them we don't know how to use them, so we use the magnetic compass.
An instrument used for measuring a quantity of something is called a measuring device or a measuring instrument. Examples include a scale for measuring weight, a ruler for measuring length, or a thermometer for measuring temperature.
The 17-letter word for an instrument used to find mass is "microbalance." A microbalance is a highly sensitive device used to measure the mass of very small objects with high precision. It is commonly used in scientific research and analytical chemistry for accurate weight measurements.
the ruler The meter stick
The instrument "Metalic tap" is generally used for length measurement in India
there are many instruments used to measure length . measuring tape is used to measure the length of room.
dendrometer
A pedometer.
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.
It is a meterstick!
Meterstick
Ruler, meter stick, yard stick
centimeter
Vernier Calipers are instruments that are used measure length. It is an instrument that provides a digit of accuracy.
A compass is an instrument containing a freely suspended magnetic element which displays the direction of the horizontal component of the Earth's magnetic field at the point of observation.