Either a ruler or a caliper.
A caliper is more accurate.
a small cm ruler An effective method to measure a fingernail would be to use a sliding caliper
ruler filler caliper etc..
Ruler. Micrometers. Caliper.
A caliper, a ruler and a tape.
A diameter is measured by using a ruler. However, you also could use a digital caliper to measure the diameter of a circle.
The easiest way to measure the thickness of a sheet of paper is to use a ruler or caliper. Simply place the paper on a flat surface, use the ruler or caliper to measure the thickness of the paper, and record the measurement in millimeters or inches.
You measure it. A ruler and a caliper are useful.
It depends how accurately you can read the scale. A ruler would only be accurate to 1 mm. If the caliper has a vernier scale it should be ten times better
It depends what they are measuring. A caliper does better with cylinders and things like that. A ruler does better with a flat distance between two marks.
No, but you could use a ruler instead.