The average human head is about one-eighth of the total height of the body. This ratio is a general approximation and can vary slightly between individuals and populations.
Keep in mind that "total height" here refers to the height of the body from the top of the head to the feet. So, if we were to divide the body's height into eight equal parts, the head would occupy one of those parts. This relationship is commonly used in art and design as a guideline for drawing human figures with anatomical proportions that appear visually balanced and realistic.
However, it's essential to recognize that human body proportions can vary significantly based on age, sex, ethnicity, and other factors. The "one-eighth rule" is a rough estimate and should not be taken as an absolute rule for all individuals. People's bodies can differ in their proportions, and variations are entirely normal.