This trend continues to decelerate across the first year; between 6 and 9 months, head circumference increases 2 cm ( in.) and between 9 and 12 months, head circumference increases only 1 cm ( in.), approximately. these measurements show that adult head circumference is related to height. Themean head circumference of a male of average height is above the 97th centile for a 16 year old on the Tanner charts. The paediatric charts are therefore inappropriate for use in adultmales. (Arch Dis Child ;) Measurement of the occipitofrontal head cir-Cited by:
Aug 05, · The average head circumference of an adult male and female is and inches, respectively. However, averages vary widely depending on the age and.