Behind every perfectly tailored “Bridgerton” costume and ad for Lululemon leggings lies the work of fit models, the unsung heroes who help designers create clothes that actually work on real bodies.

American Vogue’s August 2025 issue has been making headlines — and not only for its cover featuring actor Anne Hathaway, who is back in the limelight as she films “The Devil Wears Prada” sequel. What ...