Plunge Swimsuits

What a plunge neckline is

A plunge is a deep-V neckline that dips lower than a standard scoop — the pointed front is the defining feature. It is a neckline style, not a fabric or a cut: the same plunge front can sit on a lined one-piece, an underwire one-piece or a two-piece set.

For reference against the other necklines in the store: a scoop is shallow and rounded, a sweetheart curves up over each cup, and a high-neck covers to the collarbone. The plunge sits at the opposite end — the most neckline of the group.

What's in the pool

47 plunge-neck styles, almost all one-pieces — the plunge is fundamentally a one-piece front, so the format dominates the range — with lined and underwire cup options across it.

The honest read: this is the store's plunge construction range. A plunge is a specific neckline, so the pool is narrower than the full one-piece range — every style here has the deep-V front.

Support & wearing a plunge

The deep V does not remove the need for front support — the band, the cups and the straps do the holding. On a fuller bust, look for a lined or underwire cup under the plunge front; the shape stays the same, the support underneath changes.

In the water a well-fitted plunge one-piece holds like any one-piece — the front opening is styling, not a stability factor. Some styles pair the plunge front with an open or low back for the full statement piece; the open-back page carries those. Style-wise the neckline does the work, so keep the rest of the look simple.

The store behind the page

Sunnybikinis.com is a US swimwear store with hundreds of styles across bikinis, one-pieces, tankinis and swimwear layers, most from about $19. This collection reads the range through the lens of the plunge neckline.