As a way of fundamental approach to the garment planning, the author tried to divide growth period into some age groups basing on body type and skinfold thickness. The materials were 14, 000 boys and girls aged from 7 to 20 years old, measured in 1966-67. The following results were obtained :
1) Both in boys and girls, each of six indices out of ten presented a conversion point at the age of statural growth spurt,
i. e., 10-12 years old in girls and 13-14 years in boys. However, the conversion point of
Foot length/Stature in both sexes appeared earlier, and those of
Bust Girth/Hip Girth in girls and
Waist Girth/Hip Girth in boys appeared later than the age of statural growth spurt.
2) Concerning three principal indices (
Bust Girth/Stature, Lower Extremity Length/ Stature, and
Bust Girth/Hip Girth), the age groups 9-12 in girls and 11-14 in boys were conspicuously designated considering the conversion points and the results obtained from statistical tests. Accordingly, the growth period was divided into four age groups in each sex; 7-8, 9-12, 13-16 and 17-20 age groups in girls, and 7-10, 11-14, 15-17 and 18-20 age groups in boys, where the last group in each sex must be considered as adult stage.
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