1.6 centimeters = 16 millimeters
in centimeters
I would use inches or centimeters, or millimeters to measure this.
decameter
If you have three measurements of length (meters, centimeters, millimeters) and you multiply them together, you will end up with a measure of volume (liters). Of course, if you were to actually do this, you would want to convert all of the lengths into a common unit (convert centimeters and millimeters to meters or convert meters and centimeters to millimeters).
Most likely, you would use millimeters (could use centimeters).
centimeters
Centimeters. It is large enough (long enough) that millimeters are a bit small.
centimeters or millimeters
CM
in centimeters
Millimeters or centimeters.
Meters.
You would use a ruler and measure in millimeters or centimeters.
inches or centimeters
I would use centimeters or millimeters.
I would use inches or centimeters, or millimeters to measure this.
You could use either centimeters or millimeters, but probably centimeters.