Fashion always wobbles around. Most people, sooner or later, get a vision of how they would like to look. But unless they can get their clothes made to order and in defiance of fashion, the proportions of various elements move in and out with the tide. The artist's vision of man here is as slender as a reed. The body proportion difference between man and woman in the image with the bathing suit is not so large. High armholes, long jackets, high water pants. Form fitting but not tight, at least not in these illustrations. Of course wrinkles would be harder to draw, and detract from the illusion of 'perfect fit.' One last note is the DB with notch lapel. Almost looks bearable with a single row of buttons. I imagine CdG has brought this back more than once.