French women (most notably La Parisienne) have always been revered for their sense of style, beautiful skin and slim figures. What most people do not realize about the French, in terms of their style in particular, is that they are quite conservative. The upper echelons of French society lean towards a simple, cultivated style that eschews trends. They prefer classic, timeless pieces that are easily incorporated into their existing wardrobes. What is even more interesting is that the size of their wardrobes are much smaller than the average American's. We appear to be hoarders in comparison. As our wardrobes are packed with endless cheap, throw-away, trendy fashions that only last a season, theirs in comparison, are carefully and thoughtfully managed. They do not shop often, yet when they do, they look for quality above all. You will not find a French wardrobe overrun by Polyester.
My favorite book on the subject is Lessons from Madame Chic, by Jennifer L. Scott. She has excellent advice on how to simplify your life by creating the perfect, cultivated, 10-piece French wardrobe.