More Than Fabric: The Secret History of the Swimsuit

How to Choose One That is Actually Yours

Here is something worth knowing before your next trip to the beach: nearly every swimsuit style you've ever worn exists because a woman, at some point, broke a law to wear less fabric than the previous generation thought was decent. The swimsuit is one of the only garments in fashion history that evolved almost entirely through confrontation - arrests, court rulings, Vatican condemnations, and one designer who named a piece of fabric after an atomic bomb test. Understanding that history changes how you shop for one. A swimsuit was never meant to be a costume you apologize for. It was built, generation after generation, by women who refused to apologize for their bodies at all.

The Arrest That Started Everything

In 1907, Australian swimmer and silent-film star Annette Kellerman was arrested on a Massachusetts beach for wearing a form-fitting, sleeveless one-piece that showed her arms and legs - a look that seems almost comically modest today, since it still covered her from neck to knee. The presiding judge was lenient: he let her wear the suit as long as she covered herself with a full-length cape until she actually reached the water. Kellerman, who a Harvard professor had measured and declared to have the physical proportions of the Venus de Milo, argued that the heavy, layered "bathing costumes" of the era were unsafe for actual swimming - and she had a point nobody could dispute, since she'd already become the first woman to attempt swimming the English Channel. Her arrest backfired spectacularly: rather than shaming women back into their skirted wool dresses, it accelerated the shift toward simpler, more athletic swimwear. Within a few years, her streamlined one-piece had become broadly accepted. It's worth noting that Kellerman herself later disapproved of the bikini, insisting a body looks most beautiful in "one beautiful, unbroken line" - proof that even the pioneers of undress had their own ideas about where the line should be drawn.

An Atomic Bomb Named a Piece of Fabric

The next great leap happened not out of liberation but out of wartime scarcity. When the U.S. government restricted the fabric available for civilian clothing during the Second World War, swimwear got smaller almost by mandate - this is how the exposed midriff entered mainstream fashion, not as a statement but as a rationing workaround.

Two Frenchmen picked up where the war left off. In May 1946, designer Jacques Heim introduced a minimal two-piece he called the Atome, after the smallest known particle of matter, with a bottom just large enough to cover the navel. Three weeks later, engineer-turned-lingerie-manufacturer Louis Réard went further: after watching women on the beaches of Saint-Tropez roll down the edges of their swimsuits for a better tan, he cut away enough fabric to expose the navel entirely - the first time this had ever been done in a swimsuit. He unveiled it on July 5, 1946, at a Paris public pool, four days after the United States had conducted its first postwar nuclear weapons test at Bikini Atoll in the Pacific. Betting that his tiny garment would create a similarly explosive reaction, Réard named it the bikini.

No professional model would agree to wear it. Réard ended up hiring a 19-year-old nude dancer from the Casino de Paris, Micheline Bernardini, who modeled a suit made from roughly thirty square inches of newspaper-print fabric - small enough, famously, to fit inside a matchbox. Fashion editor Diana Vreeland reportedly called it the most important thing since the atomic bomb. The Catholic Church condemned it as sinful; it was formally banned from the first Miss World pageant in 1951 and outlawed on public beaches in several countries. None of that stopped it. Brigitte Bardot wore one at Cannes in 1953, and the floodgates never really closed again.

Hollywood Finishes What Paris Started

If Paris invented the bikini, Hollywood is what made it aspirational rather than scandalous. Ursula Andress emerging from the surf in a simple white bikini as Honey Ryder in 1962's Dr. No became one of the most referenced images in cinema history - Andress herself later said the suit essentially built her entire career. Sports Illustrated debuted its now-institutional Swimsuit Issue in 1964, reportedly conceived almost by accident when an editor found himself with no major sporting events to cover during the off-season and asked a fashion writer to fill the gap with a model in swimwear instead. Three decades later, Baywatch - with roughly 1.1 billion viewers at its global peak - turned the red one-piece into arguably the most recognized swimsuit silhouette of the 1990s, proving that full coverage could be every bit as iconic as its absence.

The Topless Swimsuit America Wasn't Ready For

Not every experiment succeeded, and the failures are almost more interesting than the hits. In 1964, Austrian-American designer Rudi Gernreich - an early gay-rights activist who had fled Nazi-annexed Austria as a teenager, where his family had embraced nude exercise as healthy before Hitler banned public nudity outright - unveiled what he called the monokini: a conservative, high-coverage bottom held up by two thin straps crossing the chest, leaving the breasts bare. Gernreich intended it as a political statement rather than a commercial product, predicting bluntly that breasts would be uncovered within five years regardless of what he did.

He was wrong about the timeline, though not entirely wrong about the direction. All five models booked for the original photo shoot in the Bahamas refused to wear it; the design was denounced by the Vatican, banned in France, picketed by concerned parents in the United States, and dismissed by the Soviet press as barbarism. Roughly three thousand were sold at department stores including Lord and Taylor for $24 apiece - genuine commercial interest - but almost no one wore one in public. When a 19-year-old model tried it on a Lake Michigan beach that same year, Chicago police detained her within minutes. The monokini never became a real garment people wore to the beach. But it did something else: it forced an honest public conversation about why a man's bare chest was ordinary and a woman's was a crime - a question that, decades later, actual courts would eventually have to answer.

Toplessness Is Legal in More of North America Than You Might Assume

For readers coming from Eastern Europe, where topless sunbathing on ordinary beaches has long been unremarkable, it's worth knowing that North America's relationship with the topic is patchwork, evolving, and considerably more permissive in specific places than most people assume.

In Ontario, the matter was settled by an actual court case. In 1991, a University of Guelph student named Gwen Jacob was arrested and fined for walking down a Guelph street topless on a 33-degree day, specifically to protest the double standard that allowed men to do the same thing without consequence. In 1996, the Ontario Court of Appeal overturned her conviction, ruling that a bare female chest is not inherently indecent and that nothing about her conduct was "degrading or dehumanizing." The ruling made toplessness legal in Ontario anywhere a man could do the same - on the street, in parks, and on beaches - with the notable exception that some municipal parks still require clothing except in specifically designated clothing-optional areas, such as Toronto's Hanlan's Point Beach. Quebec courts have interpreted the same federal Criminal Code provisions the same way, treating bare female breasts as non-indecent absent lewd conduct, though enforcement has occasionally lagged behind the law in both provinces, and going topless in Canada, while legal, remains something the majority of women still choose not to do.

In New York, the equivalent legal turning point was People v. Santorelli in 1992, when the state's highest court threw out indecency convictions against women arrested for a topless picnic staged specifically to challenge the law. The court found the underlying statute discriminatory on its face, since it restricted the female chest specifically while imposing no equivalent rule on men. The ruling applies statewide, not just in New York City, meaning it covers public parks - Central Park included - anywhere a man could legally go without a shirt. The catch, and it's a real one: the written law itself was never formally rewritten, which has led to a string of wrongful arrests over the decades by officers unaware of or unwilling to apply the ruling, and the exception for commercial nudity (paid performance, solicitation) still applies.

Florida takes a narrower, more geographically specific approach: general public toplessness remains restricted, but the law explicitly carves out spaces "provided or set apart" for nudity, which is exactly why Haulover Beach in Miami-Dade County operates as an official, legal, clothing-optional beach - one of very few explicitly sanctioned as such in the state - while toplessness on South Beach and around a number of Miami Beach hotel pools is widely tolerated in practice, if not formally codified.

The pattern across all of it is consistent: legality and social practice are two different things, enforcement varies by officer and municipality even within permissive jurisdictions, and it's genuinely worth checking local rules before assuming a beach works the way the law on paper suggests it should.

Finding the Silhouette That's Actually Yours

All of that history exists in service of one very practical goal: helping you choose a swimsuit that makes you feel like yourself, not like you're wearing someone else's idea of a body.

For a fuller bust, the priority is genuine structural support, not just coverage. Underwire tops, wide-set straps, and halter necklines distribute weight properly and prevent the sliding and gaping that thin, unstructured triangle tops struggle with. A scoop or plunge neckline in a solid, darker tone elongates the torso without adding visual bulk up top.

For a fuller hip or thigh, the classic move is a higher-waisted bottom, which smooths the tummy and creates a longer visual line from waist to hip, paired with a top that draws the eye upward and outward - a bold print, a bright color, or a statement neckline. A moderate, not extreme, leg cut tends to be far more flattering than a very high-cut style, which can emphasize width rather than minimize it.

An hourglass figure - a balanced bust and hip with a defined waist - genuinely can wear almost any silhouette, but the real opportunity is emphasizing that waist directly: a cutout at the side, a belted one-piece, or a bikini with a slightly higher-cut bottom that visually narrows the midsection.

A straighter, more athletic frame - similar measurements at bust, waist, and hip - benefits from creating the illusion of curves rather than hiding a lack of them. Ruffles, side ties, ruching, asymmetric cuts, and a bandeau or bralette top with added volume all introduce dimension a plain, minimalist cut won't provide.

For a fuller midsection, a high-waisted bottom paired with a top that has some structure - rather than a soft, clingy fabric - tends to smooth the silhouette far more effectively than trying to hide the area entirely under an oversized cover-up. A one-piece with strategic cutouts at the waist, rather than full coverage, often reads as more flattering than a suit that simply conceals everything.

For a petite frame, a suit with a lower-cut leg and a higher-cut bottom elongates the legs; busy, oversized prints tend to overwhelm a smaller frame, while a well-placed vertical detail or a single strong color does more visual work.

For a taller frame, horizontal details, contrasting colors between top and bottom, and a belted or high-waisted style can break up the vertical line in a way that reads as considered rather than accidental.

Color, Print, and Fabric Actually Matter

A solid, saturated color in a tone that complements your skin's undertone will almost always look more expensive and more intentional than a busy print, which is harder to get right and dates faster. Deep jewel tones - emerald, burgundy, cobalt - tend to flatter a wider range of skin tones than pastels, which can wash out fairer complexions in direct sun.

Fabric technology deserves real attention, not just color and cut. Look for chlorine-resistant fabric if you swim in pools regularly, since ordinary swimwear fabric degrades and loses shape within a season of chlorine exposure. UPF-rated fabric - a rating that measures actual ultraviolet protection, the same underlying concern that governs good sunglasses - is a genuine consideration for long days outdoors, not just a marketing label. And fit, as with every other garment, matters more than price: a suit that requires constant adjusting will never feel confident, no matter how well it photographs on a hanger.

A Brief Word for the Men in This Story

Men's swimwear rarely gets the same scrutiny, but the same core principle applies: fit and proportion, not price tag, determine whether trunks look considered or careless. A length that hits mid-thigh, a waistband that sits properly without needing constant adjustment, and a quality quick-dry fabric will outperform a flashier print every time. The tailored swim short - a slightly shorter, more structured cut that works from beach to restaurant terrace without a change of clothes - has become the most versatile option in recent years for exactly that reason.

What the History Actually Teaches

Every major shift in swimwear history - Kellerman's arrest, wartime rationing, Réard's atomic gamble, Gernreich's failed but instructive experiment, the court rulings that followed decades later - came from the same underlying tension: someone deciding that a woman's body needed to be regulated, and a woman deciding it didn't. The swimsuit you choose today carries all of that inside it, whether you think about it or not. The version worth choosing isn't the one that hides the most, or reveals the most. It's the one that lets you stop thinking about the suit entirely and just enjoy the water - which, when you consider what it took to get here, might be the real luxury the whole history was working toward.