Millimetres is the most appropriate measuring system.
millimetre
Neither measurement is more "accurate" than the other--they simply denote different things. Length is a measurement of the distance between two points in space. Area is a measurement of the surface covered by a given shape.
SI unit for length is meter, metre, m.
Accurate measurements of time become possible after accurate measurement of length and mass because time taken by a heavy body to move a certain distance is more,and time taken by a light body to move a certain distance is less.
The profile measurement using a profile project gives the accurate length of a given a profile. A profile projector provides a very accurate profile measurement of the same.
A vernier would be more accurate.
Angular displacements measured in radians or stradians, lengths of lines measured in units of length.
Older systems of measurement did not have sufficient precision, since they were based upon such things as the length of an arm, or the length of a foot, when different people have arms or feet that have different lengths.
Older systems of measurement did not have sufficient precision, since they were based upon such things as the length of an arm, or the length of a foot, when different people have arms or feet that have different lengths.
Well the fractional lengths is the length of a fraction
Vernier calipers are used to measure length when quite accurate measurement is required, but not such accuracy as to require a micrometer.
It may or may not be. It would depend on the man. Usually, hand and foot size are not an accurate measurement of a penis.