Non-contact three-dimensional laser body scanner is used to measure the body parts sizes of 18~25year-old young women. The grey relation analysis method is used to examine the relationship between the basic parts sizes of height, bust, waist and hip and the other control parts sizes. The koshidaka and height have the closest relationship, which illustrates lower half size of human body has more impact on height. Circumference sizes around chest are closely related to the circumference sizes around hip but has low correlation with the other parts sizes. Part size of the crotch has closer relationship with waist size than the other parts sizes.