It would be millimetres.
The answer will depend on what characteristic of the thumb you wish to measure: length, width, mass, volume, resistance to pressure, etc.The answer will depend on what characteristic of the thumb you wish to measure: length, width, mass, volume, resistance to pressure, etc.The answer will depend on what characteristic of the thumb you wish to measure: length, width, mass, volume, resistance to pressure, etc.The answer will depend on what characteristic of the thumb you wish to measure: length, width, mass, volume, resistance to pressure, etc.
I would go with millimetres
The width of an adult thumb could be somewhere between 2-4 cm.
a millimeter
5 km
The answer will depend on what characteristic of the thumb you wish to measure: length, width, mass, volume, resistance to pressure, etc.The answer will depend on what characteristic of the thumb you wish to measure: length, width, mass, volume, resistance to pressure, etc.The answer will depend on what characteristic of the thumb you wish to measure: length, width, mass, volume, resistance to pressure, etc.The answer will depend on what characteristic of the thumb you wish to measure: length, width, mass, volume, resistance to pressure, etc.
the metric system
mm
centimetre
A millimetre.
cm
Kilometres
Metres, to measure its length or width, square metres to measure its area.
I would go with millimetres
Millimetres (or centimetres to one decimal place).
None! I would measure in centimeters if I were you!
The width of an adult thumb could be somewhere between 2-4 cm.