I think that must be fashion dependent though? I can think of plenty of women's clothes that are definitely not marketed for hourglass physiques.
I can think of three major markets right now:
Rectangle (athletics-branch brands), Hourglass (most entire fashion brands), and what I believe is Spoon but could be another shape (e.g. Kardashian).
If I want to buy something I see in Vanity Fair magazine, and it fits me, then I will be buying:
- Rectangle: athleticwear or athletics-adjacent, OR ‘petite’ sizes only
- Spoon: bodycon stretch, primarily
- Hourglass: 95% of the page surface area of the magazine
Other magazines vary this formula, but VF is representing the same three body type divisions that are endemic in U.S. clothing. I think the article fails somewhat in this regard, but I honestly don’t consider it a flaw; they make a solid point and the limited niche exceptions are explicitly ‘niche only’ in the industry in favor of hourglass. I’m pretty certain I can find one niche retailer for any given triplet of { measurements, body shape, aesthetic style } — and it’s the introduction of that third component that reveals the problem. For any given style, say plaid or paisley or bodycon or flowy or “any color that isn’t red, gray, black, or white”, given a set of measurements and a body shape, there may only be one retailer known nationwide to serve that market. Torrid and Long Tall Sally both thrive in their respective triplets’ niches, but if you want clothes that fit you and are styled differently than the one retailer offers, it’s tailoring or nothing. (Incidentally, there’s a severe labor shortage of tailors in the tailoring industry as all the skilled workers are aging out of the workforce, same as CPAs in the accounting industry, so good luck finding one at a reasonable price!)
Yeah I've shopped for clothes enough for my wife to know that even with an hourglass shape, you're guaranteed to find lots of pieces that're like "OK none of these sizes will work on you". Her particular problem is a small waist paired with an hourglass. Plenty of "ruler"-shaped cuts out there on the small end of waist size, that won't work for her.
I wouldn't be surprised if women of every body shape believe that clothes must be targeting some other shape, except the ones who luck into a sizing-region in which multiple body types have a lot of overlap.