Despite the fact that we women are taught almost from birth to obsess about the appearance our bodies, what looks good on us is determined almost completely by our faces. (Read more about this here.)
Style systems that rely much more on body shape are probably going to put a disproportionate number of heavier women into the Romantic category.
That's often going to be a mistake, though. There are plenty of really big ladies who just aren't flattered by velvet and draping and ruching.
Chrissy Metz is an example of one. Romantic is much too mature for her, despite what some people would call her "womanly" figure.
She looks best when she dresses for her super-cute face, not her curvy body.
What about as a person gains or loses weight -- if one's face becomes more or less rounded, does this add or remove Romantic Style ID?
Women with a lot of Romantic essence tend to have very rounded and characteristically feminine features -- full lips, full cheeks, narrow chins, high foreheads.
I do think additional weight can sometimes add Romantic to a face.
But OTOH, it can add Gamine or Ingenue instead, by making the face appear rounder and cuter. There's overlap on those points between Romantic, Gamine, and Ingenue.
I think it takes a lot of weight change to make a significant change in one's Style ID.
And features that tend to read as R -- luscious lips, delicate chins, high foreheads, sexy eyes -- are often pretty stable, regardless of weight.
Star Jones famously had a big weight change. I think she had a good bit of Romantic before -- I liked her in blingy jewelry, lace, and a smoky eye.
Did she lose some Romantic when she lost a ton of weight? Perhaps. I can identify a few changes. Younger Star's nose reads as tiny and delicate in the context of her fleshier face; when her face is leaner, her nose reads as more strong and angular. Her overall face, though still somewhat rounded, appears a bit narrower. Maybe there's a bit more Natural or Dramatic?
But she's still pretty good in curls and cleavage emphasis. I think she retains a lot of her Romantic from before.
Star Jones' weight loss was reportedly over 100 pounds. If that really big change in a person's body results in only minor changes to the face, it's reasonable to expect that a person's style identity won't change much from less drastic changes in weight.