There is no specific size
22
16 inches
3 billion miles
30 inches
46
There is no specific size
22
Head circumference of 3 year old?
55 cm
16 inches
3 billion miles
the average size for a 10 year old boy 4'7 is 19-21 inches
The average circumference of an 8-year-old's head is around 21-22 inches. However, head sizes can vary greatly among individuals, so it's best to measure the specific child's head for a more accurate result.
Head circumference is related to body weight. As the normal weight varies widely HC can also vary. The two should correspond on a centile chart. To answer the question... Average is roughly 16 inches or 40 cm (both numbers rounded to the nearest whole number.
to be honest there is no average to this.It all really depends on the persons brain size and capacity.
The average head circumference for a 40-year-old man is around 22 inches (56 cm). However, head size can vary based on genetics, ethnicity, and individual characteristics. It's best to measure an individual's head for an accurate assessment.