The 'foot' or the 'meter' would both do nicely.
Answer: Inches
A kilometre.
The appropriate unit to measure weight is the newton. Now, if it is really the mass you wanted, you could use kilogram or gram.
A metre would be the most appropriate unit.
Length would be the most appropriate unit of measurement
yards
Hs
feet
miles
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.
Meters
feet
millometers
millimeter
Meters
The appropriate unit is a metre.