I think it's overall a great idea. Especially if the retailer can go beyond the basics and supply reliable information about the fit/cut of garments, since that

I think it's overall a great idea. Especially if the retailer can go beyond the basics and supply reliable information about the fit/cut of garments, since that is such an important element of style. Some retailers already do this as a matter of course on their labeling in-store: Tags on H&M pants, for instance, are much better than average at providing detailed fit/cut info. A potential sticking point that I can imagine is that some people will be reluctant to know their true measurements, and others might be wary of that information being stored online with their ID. (Imagine a famous actress struggling with her weight, only to have her hacked measurements exposed on some gossip blog.) Consider also, that many women are not going to want others to know their true measurements just from a glance at their laundry, so labels inside the garment should probably avoid using inches or centimeters, just as they do now for women's sizing in the US. If any of that is hard for you to imagine, check to see if you are male. These are real issues. Females contend with a vast number of societal pressures concerning body image and beauty that men rarely need to consider for themselves.