millimeters
centimeter
You would use the SI unit of length, which is the meter (m), to measure a paper clip.
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.
You would use the unit of measure called "kilograms" to measure the mass of an elephant.
The unit of measurement that has nothing to do with electricity is the meter, which is used to measure length or distance.
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
You would use meters.
I would use feet
yards
centimeter
A centimetre, unless I wanted a very precise value (why?) in which case I would use a millimetre.
miles or kilomiters
feet
miles
inch