Choosing the right swimsuit matters. The perfect swimsuit boosts your confidence, keeps you comfortable during seaside holidays or lido swims, and lasts longer when it fits and is made well.
This swimsuit buying guide will walk you through clear, practical steps. You will learn how to assess fit, what to look for in seams, lining and fastenings, and how to prioritise support or coverage depending on whether you swim laps, relax on the beach or try water-sports.
We will cover how to understand your body shape, pick fabrics and support features, and care for your swimwear. You will also find swimwear tips on brands and retailers available in the UK, from Speedo and Arena for technical performance to Marks & Spencer and John Lewis for everyday and mid-market options.
Finally, the guide touches on sustainability and ethics, such as recycled nylons like Econyl and responsible manufacturing, so you can weigh durability and price alongside environmental impact.
Understanding your body shape to pick the right swimsuit
Before you buy, take a moment to look at how your weight sits and where your shoulders, waist and hips fall. Identifying whether you are a pear, apple, rectangle, hourglass or inverted triangle gives you a clear starting point. This makes it easier to choose the best swimsuit for body type and to shop with confidence.
Identifying common body shapes and what flatters them
If you carry more weight on your hips and have narrower shoulders, you are likely a pear. For a swimsuit for pear shape, pick halter tops, patterned or embellished tops and wide straps to draw the eye up. A-line skirts, ruched bottoms and high-cut legs lengthen the leg and balance your silhouette.
If your midsection is fuller and your shoulders and hips are similar, you fit the apple profile. A swimsuit for apple shape should offer tummy control and waist definition. Try belted one-pieces, wrap-front suits or tankinis with structured panels in darker, smoothing fabrics across the middle.
With a rectangle shape you have straighter lines and little waist definition. Choose ruffled or padded tops, peplum details, cut-outs and belted styles to create curves. For an hourglass figure you are balanced; most silhouettes work well. Supportive underwired or structured tops with classic briefs or high-waist bottoms keep proportions flattering.
If your shoulders are broader than your hips you are an inverted triangle. Emphasise your lower half with patterned or detailed bottoms and soften the upper frame with V-necks or scoop necks. Avoid high-neck halters that add bulk to the shoulders.
How proportions, bust size and torso length affect fit
Your bust size affects support needs. Larger busts benefit from underwire, moulded cups, wide adjustable straps and fuller necklines to prevent spillage. Smaller busts can add volume with padding, ruffles or halter styles.
Torso length changes how a suit sits. If you have a long torso, search for a long torso swimsuit or pieces with extra stretch and longer rises. Short torsos suit designs with less rise and minimal shirring so fabric does not cut across awkwardly.
If top and bottom sizes differ, buy separates or choose adjustable pieces with drawstrings, ruching or shirring. When trying on, check for gaping cups, straps that dig in, or a crotch that pulls. Move, sit and raise your arms to test fit and coverage.
Choosing cuts and silhouettes that enhance your best features
Bandeau styles suit small-busted frames, while triangle and halter tops emphasise cleavage. One-shoulder and scoop-neck suits flatter broader shoulders when balanced by detailed bottoms. Plunging V and high-neck styles offer different levels of coverage and focus.
To lengthen legs pick high-cut legs or vertical stripes. To slim the torso choose darker central panels or side colour-blocking. To boost bust volume opt for padding and horizontal detailing at the chest.
- Try separates if your proportions need it.
- Bring a bra or wear your usual size when fitting.
- Check return policies when buying online so you can swap for the best swimsuit for body type.
Fabrics, support and practical considerations for a great swimsuit
Choosing the right swimsuit fabrics changes how a suit fits, lasts and feels. Nylon or polyamide feels soft, dries quickly and gives stretch. Polyester holds colour and resists chlorine and UV fading. Elastane, marketed as Lycra or spandex, supplies stretch and shape recovery. Blends such as nylon/elastane feel snug and comfortable, while polyester/elastane mixes, including recycled fibres like Econyl, offer the best swimsuit material for frequent pool use.
Material types and what they mean for durability and comfort
Fabric weight and linings affect shaping and modesty. Thicker fabrics and fully lined suits give more structure and concealment. Lighter, unlined styles feel breezier but may show through when wet. Finishes matter too; matte surfaces can feel more forgiving, while shiny finishes catch the eye and may reveal wear sooner.
Look for garments labelled chlorine resistant swimwear if you use pools often. Brands such as Speedo, Arena and Funkita produce technical ranges that last longer under heavy chlorinated use. Small vents or mesh panels improve airflow in active designs and reduce cling.
Support features: underwire, shelf bras and adjustable straps
Support influences comfort and confidence. Underwire and moulded cups work well for larger busts when the wire is fully encased and sits flat against your ribcage. Shelf bras and built-in options provide light-to-medium support and often include removable pads.
Adjustable straps, racerback and cross-back styles let you customise fit. Racerbacks add security for active swimming. Halter ties allow lift but can strain your neck with heavier busts. Check fastenings too; clasp backs or zip-fronts should be corrosion-resistant for sea and pool environments.
Pay attention to seams, flatlock stitching and gussets. Strong elastic at leg openings and underbust maintains shape and prevents sagging. Compression panels improve circulation and reduce bounce, while non-compression cuts give full range of motion.
Chlorine resistance, UV protection and care instructions
If you swim regularly in pools, choose chlorine resistant swimwear or polyester blends to avoid rapid degradation. Seek suits with UPF ratings for long days in the sun; tight weaves and special finishes offer added UV defence.
For best swimsuit care, rinse in cool water straight after use and hand-wash with a mild detergent. Avoid tumble drying, wringing or fabric softeners so elastane keeps its stretch. Turn suits inside out, fasten zips and use a laundry bag for delicates when machine washing on a gentle cycle.
Rotate between suits to extend life. Store them dry and flat. Repair minor issues early, replace items when elasticity drops and follow manufacturer guidance for longevity. For more advice on technical fabrics and moisture management, see this guide on choosing the right sportswear.
Styling tips, trends and where to buy the perfect swimsuit
When choosing colours and patterns, think about how they direct the eye. Dark solids create a slimming effect, while vertical stripes and colour-blocking lengthen the silhouette. Bold prints draw attention to areas you love, and a monochrome suit offers a chic, timeless look. Use these simple rules to refine your swimsuit styling for both relaxation and photos.
Accessories lift your swim outfit with minimal effort. Layer a lightweight kaftan or sarong over your suit, add a wide-brim sun hat and oversized sunglasses, and choose water-friendly sandals or espadrilles for the walk to the beach. Coordinate tones rather than matching everything exactly to keep the look modern and effortless.
Keep sun care and practical makeup in mind. Use broad-spectrum sunscreen of at least SPF 30 and reapply after swimming. If you want minimal makeup, pick waterproof mascara and tinted lip balm. For long days outdoors, consider swimwear-friendly sun-protective clothing and quick-dry cover-ups to protect your skin and extend the life of your suit.
For current swimsuit trends, look for high-waist bikini bottoms, retro one-pieces with waist-defining seams, sporty technical designs and sustainable swimwear made from recycled materials. Cut-outs, asymmetrical shapes and bright block colours are popular, but always choose trends that suit your comfort and body shape. The best places to buy swimsuits UK-wide include Marks & Spencer, John Lewis and Next for reliable fits, specialist brands such as Speedo and Fantasie for performance and support, and boutiques or sustainable labels for unique or eco-friendly options. Try on several sizes, test movement, check seams and linings, and review return policies—buying two suits, one for activity and one for style, helps your swimwear last through the season.
