millimeters
centimeter
The length of body parts varies between people, therefore it would be imprecise to measure in those units because they are not fixed.
Not quite. I believe you are referring to the angstrom or ångström, which is a unit of length equal to 1/10,000,000,000 of a meter (or 0.1 nanometers or 100 picometers). This measure of length is denoted by the Swedish letter Å, however its use is declining due to the popularity of the nanometer.
in tons.
No Meter is an unit of length, not mass.
By unit of length and distance and conversion ,we can say that the most appropriate unit to measure the length of a finger is cm.
Inches
cm
always the meter to measure length. This is an SI (international) unit of measurment, and is the standard international unit of measurment for length.
I would use feet
You would use meters.
yards
A centimetre, unless I wanted a very precise value (why?) in which case I would use a millimetre.
feet
miles or kilomiters
inch
miles