Anthropometric investigation of 670 female students (aged 18-22), 1114 schoolgirls (aged 15-18) and 253 schoolboys (aged 17-18) has demonstrated that the body structure in these samples formed a distinctive system of significantly intercorrelated variables with the body mass and length being the major characteristics. By means of a mass-length (height-weight) classification it is possible to systematize all the single parameters, indices and body composition characteristics. Body mass and length are also assumed as a basis for the formation of extreme pure somatotypes--pycnic and leptosomatic females.