Bikinis Triangulaires

A triangle bikini is a bikini whose top is two triangle cups held by ties around the neck and back. Ties adjust the fit across micro to standard coverage. Sets and bottoms run about $22 to $40.

321 products

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Triangle Bikinis: Ties Do the Fitting

What Is a Triangle Bikini?

A triangle bikini top is two triangle-shaped cups connected by ties — one tie around the neck, one across the back. The shape is the definition: the cups are cut as triangles, and strings do the fitting.

Triangle is a top construction. The bottoms vary — string, Brazilian, thong and cheeky all appear with triangle tops, and the collection includes full sets.

Triangle names the cup; ties do the fitting.

Triangle Construction Types

Triangle tops differ in how the cups are built and adjusted:

Tie-string triangle — classic neck and back ties, fully adjustable.
Sliding triangle — cups slide on the band to change coverage and position.
Padded or underwire triangle — cups with built-in structure.
Solid vs. micro triangle — cup size runs from barely-there to full triangles.

Ties are the adjusters: retying the neck or back changes how the cups sit, and sliding styles let you move the cups themselves. The same top fits differently tied loose or snug.

Cup shape sets the look; the ties set the fit.

The Styles in This Collection

Triangle tops show up across these silhouettes:

Triangle string thong sets
Sheer and micro triangle sets
Solid triangle Brazilian bikinis
Sliding triangle styles with rhinestone or backless details
Ribbed, vinyl and wrinkled-fabric triangles
Neon-trim and animal-print triangles

Prices run from about $22 to $40, and sizes from XS to XL with a few one-size pieces.

Pick the cup first, then the tie style.

Wearing and Fit

Ties are the fit mechanism: the neck tie sets how high the cups sit, the back tie sets how snug the band holds. Cups should sit flat with no gaping at the top edge, and ties should hold without digging in.

Sliding triangles adjust coverage by moving the cups together or apart on the band. Ties can loosen in the water — retie after swimming. If you prefer more structure, look for padded or underwire triangles; unlined styles are the lightest.

Ties adjust, cups sit flat, retie after a swim.

How to Choose

Work through four decisions:

Cup: micro, classic or padded
Adjustment: tie-string or sliding
Coverage: how the cups and bottoms balance
Bottom: string, Brazilian, thong or cheeky

Sizes run XS to XL with some one-size pieces — check each listing’s chart.

Cup first, adjustment second, bottom third.

Frequently asked questions

What is a triangle bikini?

A triangle bikini top is two triangle-shaped cups connected by ties — one around the neck and one across the back. The cups are cut as triangles and the strings do the fitting; bottoms vary from string to Brazilian and thong.

What is a sliding triangle bikini?

A sliding triangle top has cups that move along the band, so you can adjust how much they cover and where they sit. It is one of the adjustable triangle constructions, alongside classic tie-string styles.

What is the difference between a triangle and a halter bikini top?

Triangle names the cup shape; halter names how the straps tie behind the neck. Many triangle tops are tied halter-style, so the two words overlap — a triangle top usually has a neck tie, and halter tops often use triangle or similar cups.

What is the difference between a triangle and a string bikini?

String describes the thin-tie construction, which most triangle tops use; triangle describes the cup shape. A triangle top is usually string-tied, and string bikinis can also use non-triangle shapes — the words sit on different axes.

How should a triangle bikini fit?

The cups should sit flat with no gaping at the top edge, and the ties should hold snug without digging in. The neck tie sets how high the cups sit; the back tie sets how firm the band holds.

Do triangle bikini tops provide support?

It depends on the construction. Adjustable ties fit the cups to your frame; padded or underwire triangles add built-in structure; unlined styles are the lightest. Check each listing's cup details to match the support to your preference.

Can you adjust coverage on a triangle bikini?

Yes. Retying the neck and back ties changes how the cups sit, and sliding triangle styles move the cups themselves to change coverage. That adjustability is the point of the triangle construction.

What sizes do triangle bikinis come in?

Styles in this collection range from XS to XL, with a few one-size pieces. Because ties do the fitting, triangle tops are adjustable across a range — check the size chart on each product page.