The Wordsmith's Forge

It doesn't require fashion designers to be technicians. It requires someone to hire experts to map the dimensions and frequency of same across a reasonable portion of a target audience. People do such research for all kinds of reasons, including product development. Certainly engineers do it when designing things like cars or ergonomic chairs. Regrettably the target audience is almost always men, so they don't fit women well, but anyone could do the same for women. If they cared to.