it is only a very narrow strata of affluent French women, who achieve that 'French chic'. It requires expensive clothes and the right urban milieu
We have had a house in Normandy for over 30 years and 99.9% of French women we see wherever we go there, in restaurants, supermarket in the street, do not look any different from the average woman in the street or supermarket in the UK.
Overall, I would say that the average woman in the supermarket in England is better dressed than her French counterpart.
You can see women in England who have the English equivalent of French chic, but you would have to haunt the more expensive parts of London and the more expensive restaurants to see them. It is very much an expensive urban look.
Personally, I do not like it much, too inhuman, the expensive equivalent of looking like Barbie, and requires an arrogant frame of mind to carry it off. An assurance of one's own superiority. It also entails far more time, attention and money being given to how one looks, how one maintains it and expenditure on clothes than seems really justifiable on any grounds.