mm
A ruler or tape measure.
You'd take a ruler or measuring tape, run it from one edge of the pizza to the other, through the centre, and read off the measurement in centimetres.
A ruler or tape measure is the best unit to make the measurement with. Once you finish the measurement, you'll probably want it expressed in terms of cubic feet, to take to the garden shop and buy the bags of mulch.
a ruler or measuring tape yard stick carpenter's square caliper micrometer telescoping gauge surveyor's chain digital laser "tape measure" digital ultrasonic "tape measure" light rangefinder laser rangefinder telescopic measuring wheel map-measure wheel odometer sonar radar
metric ruler
A ruler or measuring tape
A ruler or tape measure.
a ruler or a tape measure
Crab rulers tape measures. And the regular rulers
12" or the length of your ruler.
Anything that measures length: a 30cm ruler, a metre ruler, a tape measure etc.
A ruler or tape measure can be very useful.
Rulers, tape measures, calipers.
Tape measures are useful for measuring distances that are too large to measure with your ruler.
Shells have an irregular shape; they are best measured with a flexible ruler, such as a cloth tape measure.
That task can be accomplished with a ruler, a tape measure, or a measuring cup.
A typical grain of sand measures about 1 mm in diameter.