Any sort of scale can be used to measure weight, which can then be used to help calculate mass. There do exist 'massometers', but those are usually less common except in laboratory environments.
Centimetres.
We can measure how long things are , how tall,or how far apaart they are .Those are examples of length meaasurements. The basic unit of length is meters.
By unit of length and distance and conversion ,we can say that the SI unit of length is km .
The basic metric unit for length is the metre. Rivers would be measure in kilometres (1,000s of metres)
A "length" is not a standard unit of measure.
Centimetres.
Millimeters or centimeters.
Inches or centimeters.
Any sensibly sized unit of length, such as feet, yards or metres.
the least unit to measure the length is fermo meter .
I would use a centimetre to measure the length of a boy. Not sure what a boy yard is, though.
inches or centimeters
The metric unit of length is the 'meter'.
You would typically use inches to measure a paperback book. You can measure the length, width, and thickness of the book in inches to determine its size.
Inches or centimeters
Meters should be used to measure the length of a tennis court in metric units.
centimeters