Evolution of Undergarments

Following this shift across a century of dress is genuinely one of the more satisfying threads running through this whole site, because so much of what changes in the outer silhouette each decade traces straight back to a change underneath it. Victorian corsetry — rigid, boned, laced firmly — built the outer bodice's shape from the inside out for most of the 19th century. Around 1900, the straight-fronted "health" or S-bend corset softened that shaping into a different curve rather than removing it, ushering in the distinct Edwardian silhouette.

The real break comes after that. In 1914, the American socialite Mary Phelps Jacob patented a soft "backless brassiere" made essentially from two handkerchiefs and ribbon — not the first bra-like garment ever made (a French corsetière, Herminie Cadolle, had split the corset into a separate bust-support piece as early as 1889), but a genuinely early and commercially significant step toward separating bust support from waist-and-hip shaping entirely. Through the 1920s, rigid boned corsetry gave way almost completely to soft bandeaus and elasticated girdles, matching the era's flattened, unstructured silhouette. Structured shaping came back hard with the New Look in 1947, but by then it was usually built into the garment itself — boned bodices, internal waist stays — rather than requiring a fully separate foundation garment underneath.

What I find most useful about tracking this as its own thread, separate from any single decade's entry: it explains why certain outer silhouettes were even possible. You can't sew a flat, dropped-waist 1920s dress over a Victorian corset and have it look remotely right — the undergarment has to change first, or the outer garment's whole logic falls apart.