Swimwear fit for a Siren: the Riviera‑ready guide to bikinis, one‑pieces, colours and confidence

By Irena Gravelle

Summer in Europe means long days on the sand and glamorous nights sipping cocktails by the pool. But choosing the right swimsuit can feel like a minefield — not only do you want to look and feel fabulous, you also have to consider fit, coverage, colour and even the after‑party. As Riviera Ready’s beauty and fashion insider and a model myself, I’ve tried hundreds of suits. Here’s my no‑nonsense guide to finding the perfect style, fit and hue for your body, personality and lifestyle, with my favourite picks from Sultry Siren, the sister brand to Riviera Ready.

Bikini, one‑piece or tankini? Find your shape

Bikini: versatile and tan‑friendly

The bikini remains the classic for good reason. Its two‑piece design allows you to mix and match tops and bottoms and offers nearly endless variety. Bikinis range from triangle tops and bandeaus to underwired balconettes and crop styles. Because they leave the midriff bare, bikinis are ideal if you love an even tan and want minimal fabric interference. They also boost confidence — many women discover that the right bikini makes them feel sexy and liberated. However, bikinis provide minimal coverage and may not give enough support for high‑impact sports. Choose them if you’re comfortable showing your tummy or want to mix and match sizes.

Tankini: the hybrid hero

A tankini blends the coverage of a one‑piece with the convenience of a two‑piece. It features a tank‑style top that comes in various lengths — cropped, ruched, flowy or peplum — paired with separate bottoms. This design offers more coverage for the midriff while still allowing easy bathroom breaks. Tankinis are fantastic for anyone who wants a little modesty, is looking to balance proportions or needs extra support (pregnant and plus‑size women often love them). The downside? More fabric can create drag when swimming and may limit tanning.

One‑piece/monokini: sleek and secure

Traditional one‑pieces provide the most coverage and often include built‑in shaping or underwiring — perfect if you prefer a streamlined look or plan on doing laps. Monokinis give the same secure feel but incorporate cut‑outs and plunging necklines. They flatter many body types by creating an hourglass illusion and offer more security for water sports. The trade‑off is that cut‑outs can produce unpredictable tan lines. Choose a one‑piece or monokini when you want support, a fashion‑forward statement or a suit that doubles as a bodysuit for day‑to‑night dressing.

Choosing a bottom: traditional, Brazilian or thong

Traditional/full bottoms: coverage with comfort

Full bikini bottoms have wider side panels and more fabric at the back, providing modest coverage and a secure feel. They suit nearly every body type, especially if you’re new to showing skin or prefer a conservative look. Full bottoms help balance hips on pear shapes and are practical for active swimming.

Brazilian bottoms: cheeky chic

Brazilian bottoms are cut narrower at the back with high‑cut leg openings. They offer less coverage and are designed to accentuate curves and elongate the legs. This daring style suits those who enjoy a bold, fashion‑forward look and works brilliantly on round, bubble or O‑shaped bottoms. For inverted or V‑shaped silhouettes, the high cut emphasises the waist. If you’re comfortable showing more cheek, Brazilian bottoms can transform your beach posture.

Thong and tie‑side bottoms: minimal tan lines

Thong bikini bottoms provide the least rear coverage and typically feature v‑shaped, high‑cut legs. They are perfect for minimising tan lines and are popular with sun worshippers. Tie‑side versions allow you to adjust the fit around the hips and customise coverage. They work best if you have the confidence to show off your derrière and are keen on an even tan.

Triangle bikinis: a timeless staple

The triangle bikini top is more than just a trend – it’s the blueprint of the modern two‑piece swimsuit. When Louis Réard debuted his daring bikini in 1946, it consisted of four small triangles held together with string. That design stuck because it’s adjustable, flattering and easy to wear. Today’s triangle tops still feature sliding triangles and ties around the neck and back, allowing you to customise the fit for your bust and shoulders. They’re also endlessly versatile: pair a classic triangle top with any bottom style, flip it upside‑down to change the neckline, or criss‑cross the ties for a halter effect. As the original bikini silhouette, a triangle top belongs in every suitcase – it’s a timeless piece that won’t go out of style.

Colour: flattering shades for every skin and hair

Fair skin

If your skin is very fair, create contrast and avoid looking washed out. Dark hues such as navy, red, emerald green, deep purple or marine blue flatter pale complexions, especially before you’ve tanned. Avoid nude colours, white, yellow and fluorescents which can make you appear pink or even red. Once you’ve developed a tan, delicate pastels like pink and coral look beautiful.

Light to olive/ golden skin

Olive and golden complexions tan easily and can handle almost any colour. At the start of your holiday, darker shades (black, navy, deep green, red or purple) look striking. After you’re sun‑kissed, go wild with brights, neons and even white — your tan will make these colours pop. Avoid nudes or yellows only during the very first days when you’re pale.

Dark skin

Dark skin glows in almost every shade. To emphasise your natural tan, reach for white, yellow or vibrant hues like red, orange and cobalt blue. Fluorescent colours, patterns and metallics also look incredible and highlight your complexion.

Red hair

Redheads usually have fair or porcelain skin that can redden in the sun, so colour choice is important. Most style guides recommend jewel‑tone hues such as sapphire and emerald to make coppery hair glow and flatter ivory skin. Deep reds like burgundy or merlot can look sophisticated because they echo the darker tones in your hair rather than competing with it. Earthy neutrals – think chocolate brown, burnt bronze or olive green – pick up the golden undertones in ginger hair. Soft corals and salmon can be flattering when the tone is muted rather than fluorescent. It’s worth noting that very pale redheads with bluish undertones sometimes feel overwhelmed by strong blues or true reds; in that case, opt for neutral greens, teal or charcoal instead and let your hair be the star. Conversely, pastels, neons and bright orange or yellow tend to wash out or clash with ginger locks. Ultimately, colour is personal: treat these suggestions as a starting point and pick the shade that makes you feel radiant.

Model‑approved fit tips

• Measure accurately. Use a soft measuring tape. Measure your bust around the fullest part while wearing a non‑padded bra, your waist at the narrowest point above the navel, and your hips at the widest point around your bottom and thighs. Keep the tape parallel to the floor and don’t pull it tight.
• Consult the size chart. Sultry Siren’s CATHY one‑piece size guide lists Small as bust 32–34 inches (81–86 cm), waist 24–26 inches (61–66 cm) and hips 34–36 inches (86–91 cm). Medium fits bust 34–36 inches (86–91 cm), waist 26–28 inches (66–71 cm) and hips 36–38 inches (91–97 cm), while Large suits bust 36–38 inches (91–97 cm), waist 28–30 inches (71–76 cm) and hips 38–40 inches (97–102 cm). If you’re between sizes, size up for comfort.
• Adjust for torso length. Short torsos benefit from high‑cut legs, while long torsos look balanced in styles with adjustable straps or cut‑outs. The chain straps on Sultry Siren’s CATHY can be shortened or lengthened to suit your height.
• Mix sizes. Don’t be afraid to choose different sizes for tops and bottoms. Tie‑side bikini bottoms and adjustable bikini tops make it easy to customise.
• Remember fabric stretch. Swimsuits made from polyamide/elastane (like Sultry Siren’s 82/18 blend) will stretch slightly when wet, so a snug fit on dry land is ideal.

Product review: Sultry Siren CATHY one‑piece

The CATHY one‑piece from Sultry Siren is the definition of pool‑party glam. It’s a figure‑hugging suit with bold cut‑outs at the front and back and glamorous gold‑coloured chain straps at the shoulders and waist. Available in white, black or red, CATHY is made from 82 % polyamide and 18 % elastane, giving it a luxurious sheen and comfortable stretch. The plunging neckline and high‑cut legs elongate the body, while the chain detailing acts like jewellery – no need for extra accessories. Despite the daring silhouette, the suit feels secure because the chain straps are reinforced and adjustable.

Why we love it and how to wear it:

• Instant impact: CATHY’s chain‑draped cut‑outs make it a show‑stopping statement piece, ideal for chic beach clubs or yacht parties. Because the hardware acts like built‑in jewellery, you can keep the rest of your accessories minimal.
• Support and shape: The one‑piece design smooths and supports while the high‑leg cut creates the illusion of longer legs. To accommodate fuller busts, try adding discreet adhesive cups or a bikini top underneath for extra support without compromising the design.
• Style it up: Transform CATHY into eveningwear by wearing it as a bodysuit under a sheer maxi skirt, tailored trousers or even a sleek wrap dress. The chain detail works like a belt; add statement earrings and strappy heels for a polished look.
• Rotate to minimise tan lines: The chain straps and cut‑outs will create distinctive tan lines. Rather than seeing this as a downside, treat it as an excuse to expand your swim wardrobe — rotate with a bandeau bikini or strapless style when sunbathing to keep your tan even.

Other Sultry Siren recommendations

• MIAMI thong bottoms: These cheeky bikini bottoms have thin tie‑up straps for a customised fit and minimal tan lines. Made from 82 % polyester and 18 % elastane, they offer stretch and comfort. Pair them with the matching tie‑up top for a barely‑there look.
• ICON set: The ICON top (£25) and bottoms (£25) feature a triangle silhouette with removable pads and adjustable ties. The top gives light support and pairs beautifully with high‑waisted shorts or a sarong.
• MONACO high‑waisted: For those who want tummy control, the MONACO bottoms (£28) provide flattering coverage with a retro‑inspired high waist; pair them with the MONACO top’s underwired bandeau for a sophisticated look.

From beach to cocktail bar: styling swimwear for evening

Swimwear can double as part of an evening outfit — the key is layering and accessorising. CATHY looks chic under a silk sarong tied as a skirt with strappy wedges and gold hoops; for cooler evenings, throw on a linen blazer or cropped denim jacket. Because the chain straps mimic jewellery, let them shine by keeping other pieces simple.

One‑pieces are essentially bodysuits, so think beyond sarongs. Pair a plunging suit with high‑waisted palazzo trousers and a statement belt or slip a bias‑cut satin skirt over the top for a glamorous dinner look. A sheer maxi dress or crochet tunic reveals flashes of the swimsuit underneath while providing coverage. High‑waisted denim shorts and ankle or knee‑high boots create a playful, festival‑ready ensemble — ideal with Sultry Siren’s MIAMI tie‑sides or MONACO high‑waisted bottoms. Our DUBAI metallic bikini, with its gold and silver chain details, is practically nightclub attire; wear the top under a tailored white blazer or metallic wrap skirt and finish with heels for instant disco vibes. Don’t be afraid to mix textures: a ribbed one‑piece under a sequinned mini skirt or a micro‑mesh long‑sleeved top over your bikini adds interest.

Accessories elevate swimwear to eveningwear. Layer delicate body chains over a one‑piece to emphasise the waist, or cinch a suit with a wide leather belt. A lightweight silk scarf can double as a headband, necktie or impromptu skirt. Statement earrings, bangles and an embellished clutch complete the look. Remember that the best hacks are the ones that suit your personality — whether that’s rock‑chic boots and denim, a romantic slip skirt or a tailored blazer, treat your swimwear like a versatile base and build around it. As the SoSo Swim team notes, a vibrant swimsuit can be dressed up with jeans for daytime or layered with a blazer for evening drinks.

Tan lines, tan‑through fabrics and sun safety

Love tanning but hate lines? Here are my tips:

• Rotate styles. Alternate between strapless, halter and string styles to avoid pronounced lines; undo ties when lying on your stomach.
• Go topless where appropriate. In much of Mediterranean Europe – France, Spain, Italy and Greece – women often sunbathe without a bikini top. It’s seen as a normal option for tanning or swimming and avoids strap marks. If you’re comfortable and local laws allow, removing your top can give you an even tan. Remember beach etiquette: no staring, respect others’ personal space and check local regulations before stripping off.
• Tan‑through fabrics. Special textiles like MicroTan® or Swimsara’s patented fabric are woven with thousands of micro‑holes that let a controlled amount of UV rays through, enabling you to tan evenly while wearing a suit. The fabric includes built‑in SPF and is lightweight and fast‑drying. Despite being thin, it is not see‑through — the unique construction allows light through without compromising privacy. Tan‑through suits provide SPF 8–10, promoting even tanning and Vitamin D production. They work best when the fabric lies flat against your skin and you avoid applying sunscreen underneath.
• Time your sun exposure. Avoid peak sun hours (11 a.m.–3 p.m.) and build your tan gradually. Always apply broad‑spectrum SPF 30 or higher on exposed skin and reapply every two hours.

How many swimsuits to pack for your holiday

Wondering how many swimsuits you actually need? Swimwear experts recommend packing at least three swimsuits for every week of your holiday. This allows one suit to dry while you wear the others and gives you options if saltwater, chlorine or sweat make a change desirable. For a one‑week trip, three to four suits is ideal; if your itinerary includes activities like snorkelling, paddleboarding or beach volleyball, add an extra suit or two so you can switch between outfits. Choose mix‑and‑match pieces in coordinating colours so you can create different looks without overpacking. And always tuck a spare swimsuit into your luggage – a backup ensures you’re never left without something stylish to wear.

Care and maintenance: make your swimwear last

Taking proper care of your swimwear will keep it looking fabulous season after season. After a day of sun, sweat, sunscreen and salty or chlorinated water, always rinse your swimsuit as soon as possible in cool water to remove chemicals and body oils. When it’s time to wash, hand‑wash in cold water using a mild detergent; hot water and machine cycles can fade colours and damage elasticity. Experts recommend soaking the suit for 30 minutes if you can to lift out salt and chlorine. Gently squeeze out excess water without wringing and air‑dry your suit flat in the shade – direct sunlight can degrade the fibres. Avoid sitting on rough surfaces like concrete to prevent snags and store your swimwear flat once it’s completely dry. With a bit of TLC, your Riviera‑ready pieces will stay gorgeous for longer.

Confidence & personality: how much to show?

Ultimately the best swimwear is the one that makes you feel amazing. If you’re playful and enjoy experimenting, choose bold prints, cut‑outs or Brazilian bottoms. If you lean classic, opt for a structured one‑piece in a timeless colour. Your personality influences how much skin you’re comfortable showing; there’s no rule that says you must bare all. Trying new styles in the privacy of your own home can help you build confidence before you step onto the beach. Remember that swimwear is about celebrating your body, not hiding it. You are the star of your own Riviera dream — pick pieces that make you feel like a siren and own the shoreline.

Mini‑interview: insider insights

I caught up with Riviera Ready creative director Sophia L., who shared her top tip: “Fit is everything. When clients try on swimwear, they often focus on how they think they should look. Instead, I encourage them to move — sit, stretch, raise your arms — and choose the suit that stays in place and feels comfortable. A glamorous swimsuit that you have to tug at constantly won’t make you feel confident.”

She also notes that colour can be transformative: “Don’t be afraid of contrast. Dark green on fair skin, white on deep skin or emerald against red hair can make you feel like a goddess. Sultry Siren’s chain‑detail suits are designed to catch the light, so they look just as stunning in the golden hour at a beach club as they do under the midday sun.”

Final thoughts

Whether you favour a barely‑there bikini, a chic tankini or a head‑turning one‑piece, understanding your body, skin tone and personality will help you choose a swimsuit that feels made for you. With Sultry Siren’s glamorous designs and these model‑approved tips, you’ll be ready to hit the beach — and the after‑party — in style.

Check out the current collection here: https://sultry-siren.com/