The purpose of this studyis to conduce the survey of three groups of college women living in different residential districts, Seoul, Gyeonggi-do and a district, each other, analyze the actual condition of wearing blue jeans, comparative investigate actual condition in each residential district of wearing blue jeans and cognition by change of crotch length and trend through comparison of cognition on dressed blue jeans with short crotch length. By which investigation, it was intended to understand their condition and propose of blue jeans as may offer fit with short crotch length. As the result of this study, it presented college women had hipbone blue jeans in order of 2～3 and more than 4 in all of residential districts, they purchased hipbone blue jeans with crotch length in order of for middle crotch(23 ㎝) and short crotch(21㎝) commonly in all of residential districts, and they care a lot for exposing back waist and hip of hipbone blue jeans without reference to residential district. They had a bad feeling for exposure, and as an alternative to deal with this, they answered mostly on ‘wearing hipbone underwear’ or ‘wearing long upper garment’, and there was significant difference between residential districts in silhouette and exterior fitness of crotch length among important factors when wearing hipbone blue jeans.