meter
The best unit for measuring the length of a pencil is inches.
This unit is the meter (m) in SI.
The most best unit to measure the length of a slice of pizza are inches.
feet The meter (m) is the international unit (in SI) for length.
cm mm
millimetres
It is a centimetre.
centimetres
A millimetre.
which is a better estimate for length of a pencil
The best unit for measuring the length of an ant is millimeters or centimeters. The ants are too tiny and the smallest unit of measurement would be ideal for them.
unit for measuring length