Abstract: The paper proposes the concept and definition of “human body similarity” and demonstrates this concept with a mathematical method derived from the standard human- body’s expression. This standard human body size is examined by processing body size data of 90 volunteers. This method can provide estimates for whole body size by using segment size? measurements? when? classifying? the? human? race? and? its? body? configuration.? There? exists? a? constant in the expression of human body size correlation, as well as in designing the human body model.

Key words: Ergonomics;? Human ?morphology;? Human? body? model;? Race? classification