ARTICLES

The normal, or average head circumference of a person varies by age and by gender. For an adult male, average head circumference is 22 inches. For an adult woman, it is 20 inches.

www.reference.com/science/normal-head-circumference-e9e20820c2ce2559

The average head circumference of an adult male and female is 22.44 and 20.87 inches, respectively. However, averages vary widely depending on the age and ethnicity of the individual.

www.reference.com/science/average-human-head-circumference-d6158b1df94ba148

Before purchasing a motorcycle helmet, a rider should measure his head at the largest circumference, which is typically just above the eyebrows. Since sizes of helmets typically range between small and extra-large, check...

www.reference.com/article/choose-motorcycle-helmet-fit-head-5c40b053e391a3d6

SIMILAR ARTICLES

The average circumference of a newborn's head is between 34 and 35 centimeters, according to The American Academy of Pediatrics. A newborn's head grows as much as 3 centimeters in circumference by one month. Pediatrician...

www.reference.com/article/normal-size-newborn-s-head-16f305e76d1cd205

Body size, weight gain, age, gender and hormones can affect metabolism, according to WebMD. People can control some of these factors and increase metabolism. "Metabolism" refers to how quickly the body utilizes energy.

www.reference.com/article/factors-affect-metabolism-858e0c74d6a7e1e5

Each person has four pairs of sinus cavities in his or her head. The four pairs of sinus cavities are the ethmoid, frontal, maxillary and sphenoid sinuses.

www.reference.com/article/many-sinus-cavities-head-48e8521a84689e3c

When a person is standing in the anatomical position, the head is pointed forward, the arms are at the sides with the palms facing forward, and the toes are pointed forward with the feet slightly separated. The anatomica...

www.reference.com/article/anatomical-position-14b49134b7befafb