Best One-Piece Swimsuits: Shop Styles That Flatter, Support and Turn Heads

Once considered the more modest cousin to the bikini, the one-piece has finally stepped into the spotlight. Today’s designs are anything but basic; they’re sleek, sculptural and designed to stand out, whether you’re lounging poolside or diving into the waves.

Hilary Duff was photographed by Kat Irlin in South Caicos. Swimsuit by Vitamin A. | Kat Irlin/Sports Illustrated

With updated silhouettes, luxe fabrics and thoughtful support features, one-pieces now strike the perfect balance between function and fashion. Whether you’re looking for something sporty and secure, sexy and strappy or timeless and versatile, there’s a one-piece swimsuit out there that fits your style, body type and swimwear goals—and we’ve rounded up some of our favorites for you!

Gabi Moura was photographed by Katherine Goguen at South Seas Resort on Captiva Island, Fla. Swimsuit by Frankie’s Bikinis. | Katherine Goguen/Sports Illustrated

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Editors’ picks: must-have one-pieces for fashion fans

Below, we’ve rounded up five standout options that’re absolute must-haves for fashion fans. From trend-forward picks to ultra-flattering staples, these suits prove the one-piece is more than just a backup option.

Bruna One-Piece, $179 (sommerswim.com)

A standout from the designer’s collection, the Bruna is a cut-out one-piece with a high-shine finish, cheeky coverage, spaghetti straps, a center cut-out, a back tie closure and luxe gold hardware. Made from double-lined Italian Xtra Life Lycra, it offers a body-hugging fit that looks as good as it feels.

The C One-Piece, $200 (tropicofc.com)

This cheetah-print suit is crafted from the brand’s eco-friendly Peach Perfect fabric. The square neckline and ultra-thin straps balance sexy with understated elegance, and it offers moderate coverage, a high-leg cut and skinny elastic straps.

Shape Chocolate Cut Away Bead Trim Swimsuit, $66 (prettylittlething.us)

Designed in a gorgeous cocoa fabric, this strappy one-piece is soft, stretchy and endlessly flattering. Its deep hue and affordable price make it an easy addition to your suitcase, and it’ll quickly become a go-to option thanks to its moderate coverage, crinkle texture and adjustable straps.

Heidi Floral Petal Variation One-Piece w/ Lace, $208 (montce.com)

The Heidi Floral Petal One-Piece combines delicate lace panels with ruffle details and a peek-a-boo lace keyhole cut-out. With underwire demi cups and a high-cut leg, it balances romance and support for a truly unique final look.

Riviera Floral Crisscross One-Piece Swimsuit, $109 (wiskiiactive.com)

This adorable pastel one-piece channels Mediterranean elegance with floral appliqués and a waist that defines your shape. Designed with an open back halter and criss-cross neckline, it’s equal parts delicate and daring.

Editors’ picks: one-pieces that target specific style goals

While style should never be sacrificed when shopping for the ideal suit, there are still personal details to consider. With this in mind, we've also curated a list of one-pieces designed to target specific style goals and common shopper concerns, without forsaking fashion.

Best one-piece swimsuits for large chests

Lifty One-Piece, $188 (ta3swim.com)

Available in sizes XXS through 4X with customization options for colors, cup sizes (B/C through J/K), lengths (Short through X-Long), adjustable straps and more, this timeless one-piece is perfect for anyone in need of a little extra lift.

Halter Slim & Sculpt One-Piece, $47 (cupshe.com)

This closet staple swimsuit adds a retro vibe to any swim-ready wardrobe. It also boasts removable cups, medium support and a halter-top-style neckline with adjustable ties, allowing you to remain on-trend and supported for a fraction of the price.

Best one-piece swimsuits for small chests

Shape-Enhancing Laguna High-Leg One Piece, $140 (shopsabal.com)

Sabal Swim prides itself in crafting unique swimsuit options catered to those with smaller chests, and this “shape-enhancing” one-piece is no exception! It’s available in an array of cool colors, providing light lift for all-day comfort no matter your summertime plans.

Marina One-Piece Swimsuit, $85 (abercrombie.com)

A&F Marina One-Piece | Abercrombie & Finch

This multiwear suit is a bestseller for a reason! Aside from its sweet style and chic look, it’s also available in a fun assortment of classic colors and trendy patterns, and features “removable straps and a flattering high-leg cut with cheeky coverage.”

Best full coverage one-piece swimsuits

Rock Solid Avra High Neck One-Piece Swimsuit, $184 (everythingbutwater.com)

While we’re on the subject of “coverage,” shoppers should never have to sacrifice style for comfort. Everything But Water knows this well, offering multiple full coverage swimsuit options—like the Rock Solid Avra High Neck One-Piece—that boast sleek, sultry silhouettes without losing any fabric.

The Full Coverage Malibu One-Piece, $112 (andieswim.com)

Andie Swim is another label that takes the concept of customization and turns it up a notch, allowing shoppers to change how much (or how little) coverage they want. For instance, this fashion-forward, high-neck one-piece is available in cheeky, medium and full coverage options.

Best monokinis

Tika One-Piece, $220 (baobabstore.com)

Taking all the sultry seaside vibes of a bikini and adding the comfort and coverage of a one-piece, this gorgeous number by BAOBAB is all but guaranteed to turn heads on the shoreline. With its unique cut and stylish top, you’ll enjoy the best of both swim style worlds.

Side-Tie Monokini One-Piece Swimsuit, $79.95 (victoriassecret.com)

As noted above, a monokini is all about merging the best parts of a one-piece and a bikini—something Victoria’s Secret certainly knows a thing or two about. This fun, strappy option is lightly lined with removable padding and is crafted from the brand’s “soft swimwear fabric,” which “highlights your curves with an extra dose of shimmery shine.”

Best athletic one-piece swimsuits

Streamline Suit, $200 (leftonfriday.com)

When one thinks of “athletic swimwear,” it’s difficult not to shout, “Like on Baywatch?!” Thus, it should come as no surprise that this aptly-named Streamline Suit by Left on Friday is a must for the sports-inclined. And if the Baywatch vibes aren’t for you, no worries: the suit is available in many more shades.

Women’s Jetstream Textured Bound Scoop One-Piece, $72 (us.speedo.com)

Of course, the classics remain classics for a reason, and it doesn’t get more classic in the athletic swimwear world than Speedo. Per the label, this throwback option was “inspired by the Speedo design archives,” resulting in a retro vibe perfect for your next sporty day on the sand.

What to look for in a one-piece swimsuit

Christen Goff was photographed by Katherine Goguen in Bowman’s Beach, Sanibel, Fla. Swimsuit by Zimmermann. | Katherine Goguen/Sports Illustrated

Support: Whether you need underwire, a shelf bra or compressive fabric, look for built-in elements that offer lift and stability, especially if you have a larger bust. Adjustable straps and tie-backs can help you customize the fit.

Fit and cut: High-leg cuts can elongate the legs, while ruching or paneling at the waist adds a sculpting effect. Low scoop backs and plunging necklines can show skin without compromising comfort.

Lauren Chan was photographed by James Macari in the Dominican Republic. Swimsuit by Good American. | James Macari/Sports Illustrated

Fabric matters: Opt for double-lined or compressive fabrics for more smoothing and structure. Quick-drying and chlorine-resistant materials are a must if you plan to swim often.

Style vs. function: Decide if you’re shopping for pool lounging, laps or long beach walks. If you’re moving around a lot, secure fits and stretch matter more than strappy cutouts or hardware-heavy designs.

Best brands for fashion-forward one-pieces

Jocelyn Corona was photographed by James Macari in Loreto, Baja California Sur, Mexico. Swimsuit by Monday Swimwear. | James Macari/Sports Illustrated

Monday Swimwear: Supportive, curve-hugging silhouettes made with fit-first designs.

Gooseberry Intimates: Best known for its signature plunging one-piece that hugs you in all the right places. They also have tons of other styles.

LSPACE: Nails the balance between laid-back California cool and elevated swimwear design.

Ellie Thumann was photographed by Yu Tsai in Mexico. Swimsuit by Ocean Ave By Riot Swim. Bracelets by Lizzie Fortunato. | Yu Tsai/Sports Illustrated

Riot Swim: Blends trendy cutouts with high-quality stretch materials, offering styles that sculpt while staying comfortable.

Princess Polly: Delivers budget-friendly, fashion-forward swimwear with cheeky cuts and playful details made for TikTok-worthy moments.

Blackbough Swim: Loved for its vibrant prints and multiple coverage options, with mix-and-match pieces that flatter every shape.

Eileen Gu was photographed by Ben Horton at The Boca Raton. Swimsuit by Blackbough Swim. | Ben Horton/Sports Illustrated

Learn more about bikinis here at SI Swimsuit.