It is a customary unit.
The pound is NOT a metric unit.
I'm guessing by customary, you mean imperial. if so inches are customary/imperial
it is a customary unit
The customary unit would be miles (mi), and the metric unit would be kilometers (km).
It is a customary unit.
Millimeter is one thousandth of a meter. It is the metric unit of length. The SI unit is meter.
customary
Metric.
A "gran" is a German measurement, it is neither customary or metric. A "gram" is a metric unit.
centimeters or cm in the metric system or SI and in the customary inches or in.
Fahrenheit is a customary unit
The pound is NOT a metric unit.
It is a customary unit.
customary
I'm guessing by customary, you mean imperial. if so inches are customary/imperial
The basic metric unit for length is the metre. Rivers would be measure in kilometres (1,000s of metres)