25 Best One-Piece Swimsuits That'll Be Your Trusted Faves All Summer

Meet the one-piece that's been worn by e-n-d-l-e-s-s celebs—from Sydney Sweeney and Blake Lively to Kendall Jenner and Kaia Gerber. The plunging swimsuit features a flattering high-cut style with medium brief coverage. As a bonus, the straps are adjustable, so you can feel secure and get your best fit, and it's double-lined to avoid any see-through moments. Oh, and did I mention it's available in 15 (!!!) colors?

• Materials: Polyamide, Elastane
• Colors: 15
  
• Sizes: XS-XL
  

Glowing Editor Review: "I am 5’10”, so finding a one-piece that actually fits my longer torso without making me look like a praying mantis has been a challenge, but I really love this one from Gooseberry! It has adjustable straps, which is helpful, and it comes in a bunch of different colors," says Cosmo Commerce Editor Samantha Jones.

Kimberly really gave us all the gift of a bombshell swim moment with this swimsuit. Available in SKIM's signature neutrals, this one-piece with a deep scoop back has fully adjustable straps so you feel snatched and secure at all times.

• Materials: Recycled Nylon, Spandex
• Colors: 9
  
• Sizes: XXS-4X
  

Glowing Customer Review: "The most flattering swimsuit I’ve ever owned. The combination of the low neck scoop and high leg with such amazing quality makes it the best bathing suit. In love and about to order another one"

Aerie has been my go-to spot for affordable swimwear for quite a while now. This one-shoulder option is made with the brand's flattering ribbed material and offers UPF 50 sun protection. I especially love the open back and appreciate the full-coverage bottoms.

• Materials: Recycled Nylon, Elastane
• Colors: True Black, Miami Pink
• Sizes: XXS-XXL

Glowing Customer Review: "I absolutely love this suit!! It fits perfect and is flattering. I wear a medium and it fits true to size. I have a very small chest and this suit has no padding or support at all which isn't a problem for me but be aware!! Overall so good!"

I loveee hardware details on swimsuits so much. It instantly elevates a suit and makes it look more $$$ than what it really is. Plus, Cosmo Assistant Editor Sam Olson raves about H&M's surprisingly good swimsuits. While her fave one-piece isn't available on the site anymore (because it's lasted her since 2017!), she's a fan of the brand's swimsuit quality, which lasts so long for the price.

• Materials: Polyamide, Spandex, Polyester
• Colors: Dark Khaki Green, Black
• Sizes: XS-XL

Glowing Customer Review: "It fits perfectly! True to the size. The color is beautiful in person and the details. Totally recommend!!"

This one is dedicated to girls with larger busts. Trust me, I see you, and I know finding a full-coverage, supportive swimsuit is hard, but alas, I may have found your perfect match with this shirred underwire style. Available in sizes 4-26, this supportive suit is about to be your new go-to.

• Materials: Nylon, Spandex
• Colors: Black, Military, Beautiful Blue, Spice
  
• Sizes: 4-26
  

Glowing Editor Review: "I like that this one has rushing and underwire, so it's good for the girls! And it helps that it also comes in my size," Cosmo editor Olivia Truffaut Wong puts simply.

There's a good chance you've seen this swimsuit all over your social media feeds, and I'm happy to report that the hype is r-e-a-l. Loved by multiple Cosmo editors, this suit is designed with an open corset back that allows you to manually cinch in the waist for a super snatched look. It's also available in 11 colors, from this on-trend red to classic black and beyond.

• Materials: Nylon, Spandex
• Colors: 11
• Sizes: XXS-4X

Glowing Editor Review: Cosmo Commerce Writer Sarah Maberry says, "I’ve never found a one-piece that makes me feel more snatched than the TA3 Plungey. I’ll shamelessly admit one of the brand’s viral waist-snatching vids is what convinced me to add it to my closet. It makes me feel way more confident going to the beach when I’m feeling super bloated. Wearing it feels akin to heavy-duty shapewear, especially once you cinch the lace-up back, so it’s not the most comfortable for all-day wear, but its stomach-smoothing, cleavage-enhancing powers are very much worth it."

Anything that Lisa Says Gah! touches becomes gold. This swimsuit from the brand's food-centric collab with Ookioh deserves to be worn in a cute little coastal town with an Aperol Spritz in hand. Ya feel me?

• Materials: Recycled Polyamide
• Colors: White, Black, Orange
• Sizes: XS-4XL

Glowing Editor Review: "I’m obsessed with Ookioh. They’re AAPI-owned and have sustainable one-pieces made of post-consumer waste that are less grandma and more cool girl—I’ve had my eye on their Lisa Says Gah collab since it dropped," says Cosmo Shopping Editor Hannah Oh.

"Buttery soft" is how I'd describe this strapless swimsuit. There are no cut-outs, straps, bells, or whistles on this classic find, but that doesn't make it any less note-worthy. Plus, the timeless design doubles as a bodysuit, so it's really a two-for-one deal with this effortless look.

• Materials: Lycra, Nylon Repreve
• Colors: 11
• Sizes: XS-XL

Glowing Customer Review: "Personally, this suit really worked for me! It doesn’t slip off and hugs so nicely. And people aren’t kidding about how soft it is. I want another color already!"

The power that this swimsuit held over me when it first launched should really be studied. Obsessed is an understatement when it comes to this ruched, very cheeky one-piece. Let's just say that it's the brand's best-seller for a reason. Just keep in mind that the cheeky back side doesn't leave much to the imagination.

• Materials: Nylon, Spandex
• Colors: Coconut
• Sizes: XS-XL

Glowing Customer Review: "Super flattering! I look SNATCHED. Material is also very comfortable. Extremely revealing and sexy, however, so keep that in mind if you're uncomfortable showing a little skin."

Vintage-inspired yet oh-so-timeless, this cute cap-sleeved swimsuit (bye, sunburnt shoulders!) offers modest coverage. The best part about this striped, nautical-inspired look? You can pair it with white linen pants, a skirt, or shorts for the perfect beach vacay look, too.

• Materials: Recycled Polyamide, Elastane
• Colors: Dark Evening
• Sizes: 0-24

Glowing Customer Review: "This suit is absolutely darling - it has a cool retro vibe, and the stripes make your waist look small. I'm used to ordering bathing suit in a size larger than what I wear, but I found that I needed to order my true size in this suit. The cut works well for beach activities, or throw on a pair of shorts and hat to head to lunch."

I must admit that the Kardashians do flattering cuts really well, and this one-piece is exhibit A. This suit has cheeky bottom coverage for and uses a scuba compression fabric to really give you that all-over snatched feeling.

• Materials: Nylon, Elastane
• Colors: Capri Blue, Black, Fierce Leopard, White, Palo Verde
• Sizes: XS-5XL

Glowing Customer Review: "I never buy one pieces, but this is such a flattering suit! I’m 5’4” 115lbs and ended up going with the XS. Tried on a small as well, but there was some very minor bunching in the mid-back area. If you have a booty, this will be cheeky! I feel snatched and somewhat modest but also sexy in this suit."

I truly didn't realize I would love belts on swimsuits so much, but after seeing this adorable one-piece, I'm wondering why I don't own one myself. This gorg brown pick offers moderate bottom coverage with a super stretchy fabric, but I would recommend sizing up according to reviews I've read.

• Materials: Recycled Polyamide, Spandex
• Colors: Coffee
  
• Sizes: XS-XL
  

Glowing Customer Review: "This is the perfect one piece! It’s so stylish that you still feel confident while rocking a one piece. The belt helps snatch your waist, leaving a very flattering shape! The fabric is stretchy, making it easy to get on and off."

Fact: Black will always be a classic swimsuit look. Also, fact: The combination of ruched fabric and all-over smoothing control fabric of this one-piece leaves you feeling cinched and sleek. It also features full-bottom coverage if you're not a fan of cheeky cuts.

• Materials: Nylon, Lycra
• Colors: Black, Midnight, Nova, Scotch
• Sizes: 6-18

Glowing Editor Review: "I have a gang of Miraclesuit one-pieces. They are built to shape and support curves. I always feel super sexy and confident when I wear them—especially this one," says Cosmo's Beauty Editor-at-Large Julee Wilson.

You can always count on Diarrablu to serve bold vibes, unique cut-outs, and striking patterns every. single. time. Obviously, this flutter-sleeved swimsuit is too cute to just be for the water, so the brand encourages you to add it to your closet as a bodysuit, too.

• Materials: Nylon, Spandex
• Colors: 13
  
• Sizes: S-3XL

Glowing Customer Review: "I love this bathing suit I tend to wear it as a body suit with denim shorts. Looks adorable and I ordered the skirt to match."

I remember monokinis being the hot thing when I was younger, and now they're back and cuter than ever. This adorable gingham number offers a cut-out with adjustable straps and an open back for a lil flirty backless moment.

• Materials: Nylon, Spandex
• Colors: Ladybug Gingham, Cinnamon, Sea Moss, Black
• Sizes: XS-XL

Glowing Customer Review: "I love the color and fit of this bathing suit! It’s the perfect combination of sexy and comfortable! Can’t wait to wear it all summer!!"

Available in three vibrant colors, this compressive swimsuit with built-in cups and a flattering front wrap design has summer written all over it. Suitable for most cup sizes, it's chlorine and salt water safe, so it's ready for whatever the summer has in store.

• Materials: Recycled Polyamide, Spandex
• Colors: Red, Navy, Teal Colorblock
• Sizes: 2, 4, 6

Glowing Customer Review: "This is the most beautifully constructed suit I’ve ever tried on! The plunging neckline (with molded cups for light support) compliments the otherwise demure details perfectly."

For those who want a bit more modesty and don't feel like showing a ton of skin, this affordable Amazon find has your name written all over it. Available in a ton of cute patterns, the tie skirt offers extra coverage and a super-cute photo op.

• Materials: Polyester, Spandex
• Colors: 29
  
• Sizes: XS-22 Plus
  

Glowing Customer Review: "I love this swimsuit! It provides the coverage I need when I want to be a little more modest, but is still flirty and cute with the little details. The skirt doesn’t rise up much when swimming and everything stays in place in the water. The colors are beautiful and I feel very confident wearing this swimsuit."

If you're looking for a unique one-piece, look no further than this one by Monday Swimwear that deserves a million fire emojis. The sultry cut-out is surprisingly flattering and really shows off your body. Plus, it's available in a range of sizes that caters to those with larger busts.

• Materials: Recycled Nylon, Spandex
• Colors: 11
  
• Sizes: Petite-VVV (Very Very Voluptuous)

Surf's up! This one-piece is all about the support. With a half-zip detail and built-in shelf bra, feeling secure no matter what the waves look like has never been easier. Plus, the short sleeve is ideal for avoiding that dreaded shoulder sunburn.

• Materials: Recycled polyester, Spandex
• Colors: Black, Tropical, Azul, Daisy, Newport, Taj
  
• Sizes: XS-XL
  

Glowing Customer Review: "I love the coverage of this suit. I don’t have to fuss with it and it is wonderfully comfortable. I have a long torso so I sized up and it fits great. I usually hate swimsuits and trying them on makes me quite unhappy but I ordered this online and was so happy when I tried it on. It looks fantastic."

Hunza G's beloved crinkle swimsuit is a bestseller for a reason—and not just because of the Baywatch-esque silhouette. The classic cut with a low-back is made of a super-stretchy material that's designed to mold to your body—even if it fluctuates sizes. But because of this, the brand only offers a "One-Size" option designed to stretch from a US size 2 to 12. The downside? Its definition of "one-size" doesn't cater to those above a size 12.

• Materials: Polyamide, Recycled Polyester, Lycra
• Colors: Metallic Cocoa Stripe, Lilac, Metallic Rosewood, Red, Cornflower
• Sizes: One-Size (fits US 2-12)

Glowing Customer Review: "This is one of the best bathing suits out there. It is so beyond comfortable and classic. The color is vibrant and its so nice to finally see a bathing suit that fits an array of sizes."