what is the average size of a head
Human head One study in the United States estimated the average human head circumference to be 55 centimetres (21 3⁄4 in) in females and 57 centimetres (22 1⁄2 in) in males.[4][dubious – discuss] A British study by Newcastle University showed an average size of 55.2 cm for females and 57.2 cm for males with average size varying proportionally with height [5]