The best unit of measurement to measure the length of a stapler would be in centimeters or inches. These units provide a precise and accurate measurement of the stapler's size, allowing for easy comparison with other objects. Using millimeters may be too small of a unit for measuring a stapler, while using meters or feet would be too large.
Metres.
Centimeters would be the best to use. ■
Feet and inches
metres would be the best way to work out the length of a classroom as centimetres are to small and kilometres are far to large
meters