centimeter
The metric unit used for measuring the width of a fingernail is usually millimeters (mm).
Width is a length or distance. The unit of length is the meter.
It depends on the width of the desk. You could use centimeters or meters.
millimetres (or tenths of millimetres, if you have a micrometer)
measuring temperature the metric system of °C is used.
The SI unit used for measuring width is meters (m).
The metric unit that measures the length of your finger is typically in centimeters (cm).
The SI (metric) unit for mass is the kilogram.
gram
kilometres
meter
joules