Using analysis of major components with varimax-rotation, factor analysis of 26 anthropometric parameters has been performed in 1,100 children of both sex at the age of 7-17 years. Three orthogonal components are distinguished, embracing 76.6% of total variance. The first factor--the component of general size; the second and the third factors characterize variability connected with differentional processes. After calculation of individual values of the factors, the main statistical parameters of the body integral indices are defined for all age-sex groups. Convergence of the component values of the total size is observed, when comparing cohorts of boys and girls at the conclusive stages of ontogenesis studied. As for the two other integral parameters, the boys differ from the girls nearly in all age groups; the second factor demonstrates more differences in younger, and the third factor--in older age.