In the USA, we use inches and feet. In the rest of the world, centimeters and meters.
Centimetre or kilogram - depending on whether you wanted size or mass.
a ruler
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
Centimetres.
Feet.
a centimeter
Any unit of length can be used. The most convenient number is probably the result of using inches or centimeters.
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.