@awnlee jawking
Isn't Taylor Swift looking heavy these days!
For a Woman in her mid-to late 30's Taylor Swift is remarkably fit! She may not be as slim as she was in her Teens and early 20's, nor what her posted statistics are. She can afford nutritionists, and physical trainers, etc.
Now I prefer women who are either thin and/or very physically fit, with trim waists. But even to me, TS is in supurb shape. She is only "heavy compared to some Bulimic crazy women who depends upon Liposuction, and/or a diet of Brown Rice and Cocaine to remain wasp waisted!
I take it you are only joking, Awnlee Jawking.
I do use those "Vital Statistics" sites; in particular for Porn Starlettes, since we can see them naked. Well tailored clothes may disguise more than a few pounds.
I also use sites for people who make costumes, and/or dresses at home, and speak to some people I know who have such hobbies. I have a number of charts that provide a reasonable range of Height/weight and corresponding chest (not including breast/bra cup size)/ Waist / Hips; indexed to "body fat" and muscle mass.
Most of my longer stories the characters go through changes, and their waist (and bust) sizes are determined by diet/nutrition, and the adaption of a physical fitness regime.