It is believed that it would be a helpful measure in determining the size of clothes and also an important factor in designing clothes to study the change in the human body proportion according to the physical growth of the body.
In this report, a study is made on the body proportions of boys and girls ages from 7 to 15. The summary of the results is as follows :
(1) The degree of the growth in the lengths varies with the part of the body. As for the three items of the head length (height, width, and length of a straight line drawn from the front to the back), the growth is very slow in all ages. By comparing the rate of increase in the crotch height with that in the sitting height, it is found that the former is greater than the latter for the boys who are from 7 to 13 years old, and for the girls from 7 to 11 years old.
(2) The head-body index (ratio of the stature to the head height) becomes larger and larger as the age advances, and the indexes of girls show higher values than those of boys up to the age of 13.
(3) The comparison of proportional lengths of some parts of the body made between boys and girls measured by assuming that their respective statures are 100, shows that girls over 13-14 have larger values of the total head height and sitting height and smaller value of crotch height than boys of the same ages.
