What is a normal 16 year old girl's waist size?
The 'normal 16 year old girl's waist size' would not be the
average waist size, as this would be a rather distorted
measurement, as it would include the measurement of some overweight
people.
The ideal 'normal' waist measurement for a 16 year old girl
would depend on the other proportions of the person, their height
and their weight. So an average 'normal' may be between 26" and
36".
Although, I am sixteen have a height of 5"5, weigh 105 lbs and
have a waist measurement of 23", bust 33" and hips 32". Therefore,
the answer is varying and maybe go along the guidelines of; the
waist must be at least 5" less than the measurement of your hips
and bust.