It depends on what you are measuring but feet and inches are mostly used.
Meters are used as the unit for length in most countries, but some, such as the United States, use a different system of measurement.
There are many units for measurement of length .But , for the measurement of pizza the most appropriate unit used is inches.
Kilometers
Well the SI unit of length is the meter, and SI is the first standard measurement system...
Most likely the metric system of measurement is used. I would assume millimetres would be the most likely measurement between letters.
Cubic unit means the measurement of objects using height, length, and width. It is a unit of measurement used for capacity or volume.
The meter is used to measure length.
meter, inch, yard
feet
Centimeters or millimeters.
Any unit of length can be used. The most convenient number is probably the result of using inches or centimeters.
Metres (meters), yards, feet.