&gt; I think the real difficulty with these business models is that the sizing numbers vary WILDLY across retailers<p>You&#x27;re right, and the crazy thing is that men&#x27;s[1] sizes should be completely bog-standard: they&#x27;re supposed to be lengths in inches. There&#x27;s no reason why I wear anything from a 29&quot; to a 32&quot; long pair of trousers, depending on the manufacturer.<p>I&#x27;m well aware that ready-to-wear will never fit as well as tailored; that&#x27;s fine. But there&#x27;s no good reason for <i>lengths</i> to vary so wildly.<p>[1] Women&#x27;s clothing is different, because women&#x27;s proportions have a much higher variance than men&#x27;s.