When it comes to swimwear, string bikinis remain a timeless and sizzling staple. Loved for their minimal coverage, adjustable fit, and flirty appeal, string bikinis have evolved beyond the classic triangle cut. This year, the trend takes on bold new forms, with creative silhouettes, unique fabrics, and eye-catching details that make them the ultimate beach and poolside essential. Whether you're planning a tropical getaway, hitting a rooftop pool, or just soaking up the sun in your backyard, here's a look at the most trending string bikini styles of 2025.

1. Micro String Bikinis: The Barely-There Trend

Less is definitely more this year. The micro string bikini has become a viral sensation, offering ultra-minimal coverage for the boldest beachgoers. Characterized by tiny triangle cups, narrow straps, and just enough fabric to keep things PG-13, this style celebrates body confidence.

Key features:

  • Extreme minimalism: The cups are smaller, offering more underboob or sideboob exposure.

  • T-back strings: The bottoms often feature barely-there strings that hug the hips, enhancing curves.

  • Daring color choices: Neon shades, metallics, and transparent fabrics make this trend pop.

Why it's trending: Celebrities and influencers have made micro bikinis a poolside staple, frequently posting sun-soaked snaps in their barely-there sets.

Wraparound String Bikinis: Criss-Cross Chic

If you want to add a creative twist to your classic bikini, the wraparound style is your go-to. This design features long strings that criss-cross around the waist or torso, creating a flattering and stylish effect.

Key features:

  • Extra-long strings: The straps wrap around the midsection for a sculpting effect.

  • Versatile styling: You can tie the strings in different ways, making each wear look unique.

  • High-waisted bottoms: This trend often pairs with high-cut bottoms, elongating the legs.

Why it's trending: The wraparound style gives classic bikinis a fresh, fashion-forward feel. Plus, it highlights the waistline, making it super flattering.

Crochet and Knit String Bikinis: Boho Beach Babe

The crochet and knit bikini trend combines handmade charm with beachside sexiness. These artisanal pieces are typically made with delicate yarns and intricate patterns, offering a boho-chic vibe perfect for festivals and beach parties.

Key features:

  • Textured fabric: Crochet and knit materials give the bikinis a unique, handcrafted look.

  • Pastel and earthy tones: Colors like sand, cream, blush, and seafoam are popular.

  • Matching cover-ups: Many brands offer matching crochet skirts or sarongs for a coordinated look.

Why it's trending: With the rise of sustainable fashion, handmade and vintage-inspired pieces have become hot commodities.

Metallic and Shimmer String Bikinis: Shine Under the Sun

Nothing catches the sunlight (or the camera flash) quite like a metallic string bikini. These sparkling swimsuits are perfect for standing out at beach clubs, pool parties, and festivals.

Key features:

  • Lustrous fabric: Shiny, reflective materials in gold, silver, and iridescent shades.

  • Sleek silhouettes: Classic triangle tops paired with Brazilian-cut bottoms.

  • Rhinestone details: Some feature glittery embellishments for extra sparkle.

Why it's trending: The Y2K-inspired resurgence has brought back the love for shiny and glamorous swimwear.

Metallic and Shimmer String Bikinis: Shine Under the Sun

Nothing catches the sunlight (or the camera flash) quite like a metallic string bikini. These sparkling swimsuits are perfect for standing out at beach clubs, pool parties, and festivals.

Key features:

  • Lustrous fabric: Shiny, reflective materials in gold, silver, and iridescent shades.

  • Sleek silhouettes: Classic triangle tops paired with Brazilian-cut bottoms.

  • Rhinestone details: Some feature glittery embellishments for extra sparkle.

Why it's trending: The Y2K-inspired resurgence has brought back the love for shiny and glamorous swimwear.

Metallic and Shimmer String Bikinis: Shine Under the Sun

Nothing catches the sunlight (or the camera flash) quite like a metallic string bikini. These sparkling swimsuits are perfect for standing out at beach clubs, pool parties, and festivals.

Key features:

  • Lustrous fabric: Shiny, reflective materials in gold, silver, and iridescent shades.

  • Sleek silhouettes: Classic triangle tops paired with Brazilian-cut bottoms.

  • Rhinestone details: Some feature glittery embellishments for extra sparkle.

Why it's trending: The Y2K-inspired resurgence has brought back the love for shiny and glamorous swimwear.

Sheer and Mesh String Bikinis: Barely There, Bold Everywhere

For the daring fashionista, sheer and mesh bikinis are having a major moment. This look is all about subtle transparency, offering a sexy, peek-a-boo effect without revealing too much.

Key features:

  • Translucent fabrics: Mesh or see-through panels paired with solid straps.

  • Neutral and bold hues: Black, white, and nude tones are common, while neon mesh adds a playful twist.

  • Double-layered protection: Many styles have strategic coverage with opaque patches.

Why it's trending: Sheer bikinis strike the perfect balance between sexy and sophisticated, making them a beachwear favorite.

Printed and Patterned String Bikinis: Playful and Eye-Catching

Patterns are making a comeback, with everything from bold florals to funky geometric prints taking over string bikini designs. These playful pieces add color and personality to your beach wardrobe.

Key features:

  • Tropical and floral prints: Palms, hibiscus, and tropical foliage prints dominate.

  • Animal prints: Leopard, zebra, and snake patterns remain classics.

  • Retro and psychedelic vibes: Swirly, colorful patterns inspired by the '70s and '90s.

Why it's trending: Fun, lively prints make for Instagram-worthy swimwear, perfect for vacations and pool parties.

Sustainable and Eco-Friendly String Bikinis: Style with a Conscience

As sustainability becomes a priority, eco-friendly swimwear brands are creating stunning string bikinis using recycled materials and ethical practices.

Key features:

  • Recycled fabrics: Made from ocean plastic, fishing nets, or sustainable fibers.

  • Timeless cuts: Classic triangle and bandeau tops with adjustable string bottoms.

  • Earth tones and muted colors: Inspired by nature, with shades of sage, sand, and seafoam.

Why it's trending: Consumers are becoming more conscious of their environmental impact, making sustainable bikinis a hot commodity.