A metric ruler is the most common device used to measure millimeters.
you use centemeters
Millimeters
Use a tape measure or ruler that has millimetre graduation marks.
millimeters or possibly centimeters but most likely millimeters
centermeters or inches or millimeters
I would use millimeter.......Because a butterfly is so small and we can measure it's wings by using millimeters.
centimeters or millimeters
Millimeters
Millimeters!?!?
To measure very small volumes.
You may use millimeters.
You measure a house fly in millimeters