In designing garments, it is necessary to grasp correctly the measurements of the parts of the bodies of the wearers, their physical development and the characteristics of body types. For the purpose of obtaining basic data which would meet the above requirement, we took body measurement in 1980 of 620 infant boys and girls aged between 3 months and 3 years 6 months. The present paper reports the results of our examination into the data with special reference to the 320 boys.
1. Infant boys showed a remarkable growth in every part of their bodies. The growth was particularly remarkable in weight, height items, length items and foot length.
2. The increase was most remarkably seen between the ages of 3 months and 1 year 4 months in nearly all the items. The defference was significant at 1.5%.
3. The head girth, bust girth, abdominal extension girth and hip girth of 3-6 month babies were nearly the same ranging between 41 cm and 43 cm, while those of 3 year old boys showed slight differences with bust girth and hip girth 51.5 cm, head girth 49.8 cm and abdominal extension girth 47.5 cm.
4. As age increased, the ratios to stature increased in anterior superior spina iliace height, crotch length, posterior full length and weight, and decreased in girth items and posterior shoulder width. Not much difference was seen in arm length (30-31)and foot length (15-16).
5. Infants have a body type with large head girth, bust girth, abdnominal extension girth and hip girth, and with short lower limbs as compared with stature. Their bust girth, abdominal extension girth and hip girth are of little difference, which shows infants have cyrindrical bodies.