Moved From Discussion Page - Posted by Aggie Earth doesn't have a 'length.' It has a circumferance, a mass, a volume, even a length of time or age, but it doesn't have a length.
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
The instrument used to measure the depth of the uterus is called a uterine sound. It is a slender, calibrated instrument that is inserted into the uterus to determine its length and assess its anatomy, often used in gynecological examinations and procedures.
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 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
centimeter
Ruler, meter stick, yard stick
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.