Drawing of average, standard female body for fashion requires good understanding of female body anatomy, basics of figure drawing and sense of fashion style. Standard, typical female figure in fashion drawing is a compromise between being true to anatomy and fashions stylistics.
This type of fashion figure is less affected by fashion stylization and is most true to reality. Standard fashion figure is the less stylized variation of fashion figure drawing and is the closest to realistic female body proportions. However, this type of the fashion female figure is still a fashion figure and for that reason it is an idealized model of actual female body rather than a realistic depiction of real anatomy of a real human female.
9 heads tall figure is the most commonly accepted standard in fashion drawing.
Specifics of these female figure drawing proportions is that 9 heads ratio is a middle ground between fashion aesthetic and reality. Female fashion figure represented in standard 9 head proportions looks stylish enough to be useful for fashion drawing and fashion illustration and reasonably realistic to match realities of fashion design.
As a rule, standard fashion female figure is a streamline, fit, elegant body type without any obvious signs of athletic body features or exaggerated emphasis on curvaceousness of female body lines. Standard female fashion figure is a fusion of elegance and healthy, sporty look. Standard female fashion figure depicts female human body in all its femininity without needless emphasis of curvaceousness of female body. Balance of fashion style and real female body anatomy is the key for drawing female fashion figure in its standard proportions and standard body type .