With a tape measure.
A tape measure is commonly used to measure the circumference of the head.
Usually a tape measure will do.
They measure ur head in inches and find that hat that's an extra in in circumference
To measure the distance around your head, place a flexible measuring tape around your head just above your eyebrows and ears. Make sure the tape is snug but not tight, and note the measurement in inches or centimeters. This is your head circumference.
You can place a string around the head, and then measure the string. Or measure directly with a measuring tape, if you have one that is flexible enough (basically, a measuring tape made up of cloth or something similar).
Head circumference of 3 year old?
I would use a measuring tape because it is easier to wrap it around a baby's head.
HC on an ultrasound means Head Circumference.
The circumference of a circle measures the distance around the circle.
what is the average head circumference of a 5 year old boy
The measure of an arc is part of the circumference of a circle