First you need to decide what PROPERTY of the ear you want to measure: its length, its area, its mass, its surface area, etc.
Centimetre.
You would use CM or INCHES to measure a knife
what unit of measure is thickness og a ballpen
Kilometers
The best unit of measurement to measure an alligator is feet.
Yards
Feet.
a centimeter
A shoe.
You would use CM or INCHES to measure a knife
what unit of measure is thickness og a ballpen
Ounces or milliliters.
A kilometre.
meters
Square footage.
Kilograms.
tons
Centimeters