First you need to decide what PROPERTY of the ear you want to measure: its length, its area, its mass, its surface area, etc.
You would use CM or INCHES to measure a knife
Kilometers
The unit of measurement to measure the thickness of a DVD is typically expressed in millimeters.
100 inches i think
You would use the measurement of "miles".
a centimeter
Feet.
A shoe.
You would use CM or INCHES to measure a knife
meters
inches
jolts or something
inches
Kilograms.
A kilometre.
Ounces or milliliters.
Kilometers