Centimetre
It's gonna be inches/centimeters.
Metric ruler
A ruler or tape measure.
Meter
You can use millimeters.
Any metric unit would do. But it might be easier to pick something smaller than the length of the pencil, like a centimeter, or a millimeter.
It's gonna be inches/centimeters.
Metric ruler
cm for a reg. hb pencil it's about 1 cm
Millimetres
a millimeter
A ruler or tape measure.
meters
Metres.
Micron
Meter
no clue sorry by.