In order to compare the sizes of infants` brands, the apparel size #70 and #80, #90 were surveyed, while upper body lengths, bust circumferences and waists, hip circumferences, shoulder length, sleeve length, neck circumferences of infants`` underwears were examined. As a result, it was found that upper body lengths, chest circumferences and lower body lengths of infants`` underwears differed more or by 2.0~3.0cm among brands than other sizes. In case of underwear size #70, the average upper body length was 32.8cm; the upper body size of "c" brand was longest or 33.5cm, while that of "e" brand was shortest or 32.0cm. In case of size #80, the average upper body length was 36.0cm; the upper body size of "a" brand was longest or 37.0cm, while that of "e" brand was shortest of 35.0cm. Such findings may be attributable to the fact that the main customers of "a" and "b" brands whose pattern sizes are larger are middle or lower class people who tend to buy larger infants` apparels than their children`s actual body sizes. In contrast, "e" brand seems to target the upper class who prefers the apparels almost fitting their children`s actual body sizes.