Swimwear Buying Guide: Finding a Fit You Feel Good In

Quick answer

Choose swimwear by fit first, style second: measure your underbust and hips, then pick a top with adjustable straps and a bottom rise you'll actually wear. If you want one set that works for most summer days, a high-waist bottom with a self-tie or multi-way top gives you the most flexibility. Buy for the body you have today, not a size you're aiming for.

A swimsuit only works if you'll actually wear it — on the beach, at the pool, and in the photos you don't delete. That usually comes down to two things: how the top stays put and how the bottom sits on your hips. Everything else, from color to cut, is easier to decide once those two fit points are right.

This guide walks through the decisions that matter when you're shopping: sizing, coverage, rise, and how to mix pieces so one purchase covers more than one occasion. It's written for real summer use, not a runway.

Start with your measurements, not the size label

Swimwear sizing varies more than everyday clothing because the fabric stretches and the fit depends on where the seams land. Measure your underbust and your fullest hip point with a soft tape, then compare those numbers to the brand's size chart rather than the size you wear in jeans. If you're between sizes, size up for bottoms and consider a top with adjustable straps so you can fine-tune the fit.

Pay attention to the option types a product offers. Some pieces list both size and color, which makes it easier to get the fit right and the look you want. If a product only lists size, that's a limitation worth noting — you'll have fewer color choices, but the fit decision stays the same.

• Measure at the end of the day when your body is at its natural size.
• Check whether the product offers size and color options before you commit.
• When in doubt on bottoms, choose the larger size — a snug band is easier to adjust than a tight leg opening.

Choose top support based on how you'll move

A bikini top needs to do one job well: stay where you put it. Self-tie styles and adjustable spaghetti straps let you tighten or loosen as you swim, sunbathe, or walk to the water. If you want more than one look from a single top, a multi-way design is the practical choice because you can change the straps instead of buying a second top.

Coverage is a personal call, but it's worth matching it to your activity. A classic cut with a knot detail works for lounging and light swimming. If you plan to swim laps or play in the waves, look for a top with a firmer underband or wider straps so it doesn't shift.

• Adjustable straps are the single easiest way to fix a top that feels loose.
• A self-tie front knot lets you control the fit across the bust.
• If you'll be active, prioritize stability over minimal coverage.

Pick a bottom rise you'll actually wear

The rise — how high the waistband sits — changes how a bottom feels and how it pairs with tops. A high-waist bottom with a high-cut leg and Brazilian cut gives coverage across the stomach and a longer leg line, which many people find comfortable for all-day wear. A lower rise sits on the hips and can feel lighter, but it moves more when you sit or bend.

Think about where you'll wear it. If you're mostly at a pool with a towel nearby, a lower rise is easy. If you're walking, playing with kids, or spending hours in the sun, a high rise stays put and needs less adjusting. Neither is better — they just suit different days.

• High-waist bottoms suit long days and active beach trips.
• Low-rise bottoms feel lighter but need a top that won't gap.
• Check the leg cut: a high-cut leg changes the silhouette more than the rise alone.

Build a small set that mixes and matches

You don't need five swimsuits. Two tops and two bottoms in colors that work together give you four outfits and take up less drawer space. Start with one neutral set for everyday swimming, then add a second top in a different shape or color for variety.

This is also the easiest way to handle fit changes. If your top fits but your bottom doesn't, you replace one piece instead of the whole set. Look for pieces that share a color family so mixing still looks intentional.

• Two tops plus two bottoms equals four combinations.
• Buy one set that fits well before adding a second style.
• Keep colors in the same family so any mix looks deliberate.

Care and longevity: what to check before you buy

Swimwear lasts longer when the fabric can handle chlorine and salt. Rinse your suit in cool water after every wear, and avoid leaving it damp in a bag. If a product is made with recycled materials, that's a sign the fabric was chosen with durability and lower impact in mind — but it still needs the same rinse-and-dry routine.

Check the seams and straps before you commit. Reinforced straps and clean stitching are what keep a top from stretching out after a few wears. If you're between two sizes, the smaller size will stretch with wear, so choose the one that fits snugly but doesn't dig in.

• Rinse in cool water after each wear to protect the fabric.
• Lay flat to dry — hanging can stretch wet straps.
• Snug but not tight is the right fit for swimwear.

Decision rules for choosing your swimwear

• If you want one set for most summer days: Choose a high-waist bottom with a self-tie or adjustable-strap top, like Leona + Core High, so you can tighten the fit as you move between swimming and lounging. One adjustable set covers more occasions than two fixed-fit pieces.
• If you want styling variety from one top: Pick a multi-way design such as Low Versatile Bikini Top, which can be worn in numerous variations, so you can change coverage without buying a second top. Multi-way tops are the best value if you get bored with one look.
• If you prefer soft, wire-free support: Look for an underbust band and wide shoulder straps, like Blue Amber Bralette, which provides support without underwires and stays comfortable for longer wear. Wire-free doesn't mean unsupported — check the band and straps.
• If you're between sizes: Size up for the bottom and choose a top with adjustable straps. A snug band is easier to loosen than a tight leg opening is to stretch. Adjustability is your safety net when sizing is uncertain.

Product facts that help you decide

• Leona + Core High: A bikini set with a self-tie knot at the front, adjustable spaghetti straps, and slightly gathered sides; the high-waist bottom has a high-cut leg and Brazilian cut, made with sustainable materials in Poland. The adjustable straps and self-tie let you control the fit, while the high-waist bottom gives coverage and a longer leg line — a good match if you want one set for long beach days.
• Low Versatile Bikini Top: A multifunctional bikini top that can be worn in numerous variations, made responsibly in Berlin with sustainable materials. If you want more than one look without buying a second top, a multi-way design gives you styling flexibility and lets you adjust coverage to the occasion.
• New Moon High Set: A black panty in super-soft, stretchy lace with a high waistband; the bra is wire-free and adapts to your curves, with decorative edges that stay invisible under clothing. The wire-free bra and high-waist panty offer a soft, adaptive fit — useful if you prefer less structure and want pieces that don't show under clothes.
• Blue Amber Bralette: Cut from a super-soft, stretchy lace with an underbust band and wide shoulder straps; the wire-free cups still provide support, made responsibly in Poland. Wide straps and an underbust band are the features that keep a wire-free top stable, so this is a practical choice if you want support without underwires.

Who this swimwear approach is for

Best for

• Anyone who wants a swimsuit that stays put during real summer activity, not just sunbathing.
• Shoppers who prefer adjustable, wire-free styles and high-waist coverage.
• People building a small mix-and-match set instead of buying many single outfits.

Not for

• Shoppers looking for structured, underwired swimwear with molded cups.
• Anyone who wants a fixed-fit, low-maintenance suit with no adjustable parts.
• Those shopping strictly by trend rather than by fit and coverage needs.

The right swimsuit is the one you reach for without thinking. Measure first, choose adjustable pieces where you can, and pick a rise that matches how you actually spend your summer days. Start with one set that fits well, then add a second top or bottom when you know what you love.