Millimeters.
Inches (or centimeters, if you're working in the metric system).
You should clarify what you want to measure about it: its diameter, mass, weight, color, etc. If you want to measure its diameter, that would usually be specified in microns (= micrometers).
Meter.... or more likely millimeters
To find the volume of a pencil, you can approximate it as a cylinder. Measure the diameter of the pencil to find the radius, and then measure its length. Use the formula for the volume of a cylinder, ( V = \pi r^2 h ), where ( r ) is the radius and ( h ) is the height (length of the pencil). Calculate the volume using these measurements.
Metric ruler
An average pencil when new would be around 15 centimetres long.
The metric unit used to measure the mass of a pencil would be grams (g).
Micrometer
milimetersMilliliter
to be honest I would use a metre ruler that really helps a lot place your metre ruler on your desk. put your pencil starting from 0. Then measure it. This is how you would measure it.
Inches (or centimeters, if you're working in the metric system).
You should clarify what you want to measure about it: its diameter, mass, weight, color, etc. If you want to measure its diameter, that would usually be specified in microns (= micrometers).
Meter.... or more likely millimeters
You could use either centimeters or millimeters, but probably centimeters.
An appropriate metric unit of mass for a pencil would be grams.
Metric ruler
The width of a pencil would be the metric unit of centimeters