Men's clothing is almost always measured in inches (in the US). Again, I think that this is a matter of perception.. the garment industry percieves that men don't care what "size" they wear, so the industry has absolutely nothing to gain by creating arbitrary sizes and changing what those sizes signify for men, and a lot to lose (men generally hate to try things on in stores, and hate taking things back even more).
The perception continues to be that the majority of women are a bunch of bubbleheaded ninny-pinnys who desire to be able to say that they wear a size 4 when they actually wear a size 20. It is nothing less than bizzare.
When my mother passed away last year, I found some RTW dresses in her closet from the 50's which were clearly marked size 20 and size 22.. These clothes were what I would consider about an 8/10. That is a real indicator on how far "vanity" sizing has gotten in women's RTW.
me