The best plus size swimsuits fit your body as it is, support where you want support and let you actually enjoy the water. That requires more than a bigger size on the same pattern. Good extended-size swimwear is cut with extra room for the bust, hips and torso, uses stronger elastic and construction and offers real choice in coverage and style.
This guide explains what to look for in plus size swimwear, from bust support and strap design to fabric weight, lining and leg openings. You'll find the main styles with advice on who each suits, a fitting-room checklist and care tips. Think of it as a set of criteria you can take to any store or website that carries curve swimsuits.
How we chose: the criteria for plus-size swimwear
We judge extended-size swimwear on the same points as any other swimsuit, with extra attention to patterning and structure.
- Sized and patterned for the body. Look for suits designed for extended sizes, not straight sizes scaled up. Torso length, bust shape and hip curve should be considered.
- Support. Wide straps, firm bands, molded cups, underwire or a built-in bra give lift and comfort.
- Fabric weight and stretch. A substantial knit that recovers well holds its shape and feels secure in the water.
- Lining and opacity. Full lining prevents transparency when wet.
- Seams and edges. Soft, flat seams and wide elastic prevent digging and chafing.
- Adjustability. Straps, ties and closures that adjust let you customize fit.
- Range of styles. A brand that offers many cuts shows it takes extended sizes seriously.
The main plus-size swimsuit styles and who each suits
One-piece swimsuits
A one-piece provides full coverage and lots of structure. Look for adjustable straps, a supportive built-in bra and extra torso length. Ruching or wrap details at the midsection are popular and comfortable. For more options, see our guide to the best one piece swimsuits.
Tankinis
Tankinis combine a longer tank top with separate bottoms. They give you freedom to buy different sizes on top and bottom and are convenient for bathroom breaks. Choose a hem length that covers as much as you want without bunching.
Bikinis and two-piece swimsuits
Two-piece swimwear in extended sizes has expanded, and for good reason: plenty of people want the comfort and flexibility. Choose tops with a firm band, wide straps and good cup structure, and bottoms with a wide waistband and leg openings that don't cut in. We cover this style in more detail in the guide to the best bikinis.
Swim dresses and skirted suits
A built-in skirt provides extra coverage across the hips and thighs, and the shorts or brief liner underneath keeps you comfortable. These are practical for relaxed days, travel and for anyone who wants a dress-like silhouette.
Swim shorts, boyshorts and leggings
Longer-leg bottoms prevent chafing between the thighs and add sun protection. They pair with a tankini, a bikini top or a rash guard. Many people wear swim leggings for water sports or sun-heavy days.
Rash guards and swim tops
Long- or short-sleeve swim shirts add sun protection and coverage for surfing, paddleboarding and long days outdoors. They work with swim shorts or leggings as a comfortable and practical swim outfit.
Sport and athletic swimsuits
For lap swimming and water workouts, look for a snug, secure fit, a supportive racerback or crossback and chlorine-resistant fabric.
Support: what to look for by bust size
Bust support is usually the biggest fit challenge. Check these features.
| Feature | Why it matters |
|---|---|
| Underwire or molded cups | Lift and separation, a rounded shape |
| Firm underband | Does the main support work, like a bra band |
| Wide, adjustable straps | Spread weight and avoid digging in |
| Halter or crossback designs | Redistribute weight away from the neck or shoulders |
| Side boning or panels | Keep the shape secure at the sides |
| Soft inner lining | Prevents rubbing and irritation |
Choose cup sizes if a brand offers them, because they mimic a bra's fit. If a suit labeled with letter sizes comes in your range, use the size chart as a guide, then adjust based on how the band and cups sit.
Choosing by comfort and preference
There is no right body for any swimsuit. These suggestions are starting points, and your preferences decide.
- If you want a smoother line at the midsection: Look for ruching, wrap designs and a lined front panel.
- If you prefer a longer torso line: Seek styles labeled tall or long, with adjustable straps.
- If your thighs rub: Choose boyshorts, swim shorts or a skirted suit with a built-in liner.
- If you want maximum coverage: Long-sleeve rash guards, leggings and high-neck designs.
- If you want to show more skin: High-leg cuts, plunge necklines and cutouts exist in extended sizes, and the best ones have the structure to stay comfortable.
- If you dislike feeling restricted: Look for soft but substantial knits, wide elastic and flat seams.
The fitting-room checklist
- Shoulders: The straps should sit securely and not dig in.
- Bust: Cups should lie smoothly with no spill at the edges and no gaping.
- Torso: Bend, sit and twist to be sure the suit doesn't pull.
- Legs: Openings should lie flat and not leave marks.
- Back: The fabric should sit smoothly without rolling.
- Movement: Raise your arms, squat and walk to confirm nothing shifts.
If shopping online, read the size chart carefully, check the torso measurement and look at customer photos for fit reports. Check the return policy before ordering, since swimwear often has specific conditions.
What to consider before buying the best plus size swimsuits
Fabric
A mix of nylon or polyester with a good proportion of elastane gives stretch and recovery. Look for fabric that feels substantial instead of thin, which can lose shape quickly. Polyester-based blends tend to resist chlorine and fading, so they suit frequent swimmers. Compression or power-mesh panels in the front add extra hold.
Color and print
Dark solids and busy prints hide sunscreen marks and wear. Light shades can look striking but are more likely to show through if the lining is thin. Check any pale suit in daylight. Choose colors you enjoy, since you'll wear it more.
Budget tiers
Entry-level swimsuits are a reasonable choice for occasional use, though check lining and straps carefully. Mid-range options often add better support and fabric. Investment swimsuits make sense if you swim often or need specialist support. Compare features, not just the price.
Care and longevity
- Rinse in cool, fresh water after every wear.
- Hand wash gently and lay flat to dry in the shade.
- Avoid dryers, hot water and wringing.
- Avoid rough surfaces like concrete pool edges.
- Rotate two suits so each can fully dry between wears.
Shopping smart for curve swimsuits
Extended-size swimwear is often sold in a more limited range than straight sizes, so a little strategy goes a long way.
- Start with the size chart, not the label. Measure bust, underbust, waist, hips and torso, and compare to each brand's chart. Sizes differ widely between labels.
- Read the fit notes and photos. Customer photos on a range of bodies show how a suit behaves better than a studio shot.
- Check where the support comes from. If the description doesn't mention lining, cups or bands, ask or look elsewhere.
- Order two sizes if returns are easy. It saves time, and you can send back whatever does not work.
- Think in separates. Buying top and bottom independently solves most fit problems.
- Try the suit at home. Walk around, sit and stretch. A suit that feels fine standing can pinch when you sit.
Common mistakes to avoid
- Choosing a smaller size for a smoother look. A suit that is too small pulls and digs in.
- Ignoring torso length, which causes more discomfort than any other measurement.
- Buying thin, unlined fabric because it is lightweight.
- Skipping a layer for chafing when your thighs rub, and then blaming the suit.
- Putting a wet suit in a hot dryer.
Building a vacation swim wardrobe
You'll rarely need more than a few pieces: a reliable main suit, a second suit in a different style for rotation, and a rash guard or cover-up for strong sun. Add swim shorts if chafing is a concern. Beyond the beach, think about easy layers for the walk to lunch. If you are planning a full vacation wardrobe, our guide to the best plus size jeans can help with the denim side of your packing list, and the best swimsuits for women overview covers silhouettes across all sizes.
Frequently asked questions
What should I look for in plus-size swimsuits?
Look for suits designed for extended sizes, with wide supportive straps, a firm band, a full lining and fabric that holds its shape. Check torso length and the size chart, and use the fitting-room checklist to confirm comfort.
How do I get bust support in a swimsuit?
Choose styles with underwire, molded cups or a built-in bra, a firm underband and wide adjustable straps. Halter and crossback designs also redistribute weight. If a brand offers cup sizes, use them as you would for a bra.
What swimsuit prevents thigh chafing?
Swim shorts, boyshorts, swim leggings and skirted suits with a built-in liner add a layer between the thighs. Look for flat seams and a soft fabric.
Can I wear a bikini in a plus size?
Absolutely. Plenty of two-piece swimsuits come in extended sizes, and many offer supportive tops and wide-banded bottoms. Choose pieces with structure and a good fit, and mix sizes if needed.
How can I tell if a swimsuit will hold up to chlorine?
Check the fabric content on the label. Polyester-based fabrics are generally more resistant to chlorine than nylon blends. Rinse after every wear, and avoid leaving the suit wet in a bag.
In short
The best plus size swimsuits are cut for extended sizes, supportive where you need it and made from fabric that holds its shape in the water. Start with fit and support, pick the coverage you feel good in and take care of the suit after every swim. For more ideas, explore our complete Swimwear section.
