In the US, the average American woman wears a size 12. Not the movie stars or TV stars but just the everyday, normal wife and mom in America. In America, the size 12 is the higher end of the previous poster, 68 kg which is right around 150 lbs. If the women is short, then by American medical standards should would be considered overweight. 5 foot 6 inches and taller would indicate the woman is of average weight and falls within medical norms. The important thing to note is that this is the average weight of American women and not the famous women.
Famous American women are going to be below 50 kg and usually much lower regardless of their height. For famous American women 5 foot 9 inches or taller their weight usually does not exceed 56 or 57 kg., which is VERY thin for that height. But this is what makes them famous. The ability to maintain such a low weight while being very tall and having a pretty face. Everyone has preferences and they are all different. That is what makes the world go 'round!