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
A reasonable metric unit of length for a cell phone would be centimeters (cm) or millimeters (mm). Cell phones are typically measured in these units due to their small size. For example, a standard cell phone may have dimensions of around 14 cm in length and 7 cm in width. These units are more practical for measuring objects of such size compared to larger units like meters.
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.
Inches and feet measure length in standard units, in metric meters and centimeters measure length.
the metric system
centimetre
cm
A millimetre.
Kilometres
Metres, to measure its length or width, square metres to measure its area.
The metric unit used for measuring the width of a fingernail is usually millimeters (mm).
The width of a pin would typically be measured in millimeters (mm).
To measure the width of a stamp, you would typically use millimeters (mm) as the metric unit. Stamps are generally small, and millimeters provide a more precise measurement than centimeters or meters. For example, a standard postage stamp might measure around 25 mm in width.
Millimetres (or centimetres to one decimal place).