On April 1, 2026, the Poster Girl c-string made fashion history as Poster Girl unveiled its record-breaking “World’s Most Expensive C-String,” now classified by Guinness World Records.

On April 1, 2026, the Poster Girl c-string made fashion history as Poster Girl unveiled its record-breaking “World’s Most Expensive C-String,” now classified by Guinness World Records.
April 1, 2026
According to the brand’s own description, the Poster Girl c-string consists of more than 2,000 round-cut diamonds encrusting the main body, along with 34 rare pink diamonds arranged into the label’s initialled logo. It is poised on a hand-carved, latex-covered base and finished with what Poster Girl calls the groundbreaking beauty of a Sakura Diamond tail at the back. The result feels less like underwear and more like a high-camp jewel object that happens to flirt with the form of a garment.
Poster Girl has always understood that fashion’s most potent currency is not only craftsmanship, though this piece clearly leans into that, but the ability to make an image erupt. A c-string already lives at the outer edge of wearability, where provocation, performance, and body-conscious fantasy blur into one another. Poster Girl pushed that logic to its most extravagant conclusion, dressing the near-invisible in diamonds and giving minimal fabric the maximal fantasy of a world record.

The Poster Girl c-string also captures the brand’s particular genius for turning shock into polish. There is latex, there is spectacle, there is a knowingly outrageous sense of humor, though underneath it sits an exacting luxury language: rare stones, sculptural presentation, branded symbolism, and the careful transformation of a viral idea into an object of fetishized rarity. It is absurd, glamorous, and very aware of its own absurdity, which is precisely why it works.
Poster Girl c-string entered fashion lore as more than a provocation piece. It became a Guinness-classified object of fashion theater, one that shrank clothing down to almost nothing and then loaded that nothingness with diamonds, fantasy, and the kind of headline that modern fashion loves best. Some garments arrive to be worn. This one arrived to be talked about.