Bikini (two-piece women's swimsuit)

Design, parts and common variations

Typical components of a bikini include a bra-like upper garment and a separate lower garment that covers the pelvis. Designs vary by cut, coverage and construction. Common variants include:

• Triangle, bandeau, halter and underwire tops — differing in shape and support.
• Briefs, high-waisted, string, and thong-style bottoms — offering varied coverage.
• Derived styles such as the tankini (two-piece with a tank-style top), monokini (a revealing one-piece or bridged design), and microkini (minimal coverage).
• Functional distinctions: fashion bikinis versus performance swimwear, which tends to favor one-piece suits or more streamlined cuts for competition.

Materials and construction

Bikinis are commonly made from stretchy, quick-drying fabrics such as nylon blends, polyester and elastane (Lycra). Construction can include lining, padding, underwire or adjustable straps. Fastenings range from ties and clasps to seamless bonded edges in minimal designs.

History and development

Although two-piece garments appear in ancient art and archaeological finds, the modern bikini was popularized in the mid-20th century. After World War II designers reintroduced small two-piece styles that departed from the more conservative swimwear that preceded them. The name and the publicity around the garment contributed to rapid acceptance in many countries, while social attitudes and fashion cycles continued to shape its adoption.

Uses, cultural significance and industry

The bikini is among the most recognizable types of beachwear and has had a major cultural impact on beauty standards, advertising and leisure industries. By the mid-2000s the bikini segment was a significant commercial category, and its popularity has encouraged related services and businesses such as grooming and tanning; for example, the growth of bikini waxing and commercial spray-tanning services is often linked to demand for this style of swimwear.

Notable considerations

Acceptance of the bikini varies by country, setting and occasion; some places and events favor more coverage for cultural or religious reasons, while others embrace minimal swimwear as a norm. Designers continue to innovate with sustainable materials, inclusive sizing and hybrid styles that blend modesty with contemporary fashion. The bikini remains both a practical garment for swimming and sunbathing and a symbol of changing attitudes toward body display and fashion.