The one piece swimsuit has never been more popular. Flattering, practical and endlessly stylish, a great swimming costume offers everything a bikini does - and often more. Whether you're looking for a classic black swimsuit, a bold printed one piece or a supportive underwired swimming costume for bigger busts, we've gathered the very best styles for 2026.

At Beach Cafe, our swimsuit collection brings together the world's finest swimwear designers, each with their own distinct approach to the swimming costume. Here's our expert guide.

Best One Piece Swimsuits Overall

Seafolly - the iconic Australian swimwear brand that has been making exceptional one piece swimsuits for decades. Seafolly's swimming costumes are known for their flattering cuts, vibrant colours and exceptional quality. Their one piece swimsuit styles include everything from minimalist black swimsuits to bold printed designs. A brilliant starting point for anyone looking for a reliable, stylish swimming costume.

JETS by Jessika Allen - an Australian brand celebrated for sophisticated one piece swimsuits that combine fashion-forward design with serious functionality. JETS swimsuits are particularly known for their tummy-control panels, underwired support and flattering silhouettes. Their swimming costumes are designed to look as good poolside as they do in the water.

Away That Day - Away That Day has quickly become one of the most exciting names in luxury swimwear. Combining minimalist British design with sustainable craftsmanship, their one piece swimsuits offer clean lines, premium recycled fabrics and beautifully considered fits.

From elegant bandeau silhouettes to classic scoop-neck styles, Away That Day creates swimming costumes that feel effortlessly modern while remaining endlessly wearable. Their understated aesthetic makes them perfect for both beach holidays and luxury resort escapes.

Browse our full range of designer swimsuits at Beach Cafe UK.

Best Swimming Costumes for Bigger Busts

Finding a swimming costume that offers real support for bigger busts can be challenging - but it doesn't have to mean sacrificing style. Our complete guide to swidesmwear for bigger busts covers everything you need to know, but as a starting point, look for:

• Underwired swimming costumes for maximum support and lift
• Adjustable straps that can be customised for your shoulder width
• Higher necklines that provide coverage without compromising style
• Power mesh lining for additional support and shape retention

Sea Level is particularly outstanding for supportive swimming costumes, offering D-G cup sizing in beautifully designed styles that don't compromise on fashion.

Best Bandeau Swimsuits

For minimal tan lines and a sleek, modern silhouette, a bandeau swimming costume is hard to beat. Seafolly offers some of the best bandeau swimsuit styles in our collection - their strapless one pieces are beautifully structured and stay in place without straps, making them ideal for sunbathing.

Away That Day produces outstanding bandeau swimsuits in sustainable luxury fabrics, with elegant, understated designs that photograph beautifully. Their sustainable approach to swimwear means you can enjoy luxury style with a lighter environmental footprint.

Best Swimsuits for Holiday

When choosing a swimming costume for holiday, durability and versatility matter as much as style. Look for:

• Chlorine-resistant fabric that holds its colour and shape after repeated pool use
• UV protection built into the fabric for additional sun safety
• Quick-drying materials that are comfortable to wear between swims
• Secure closures that stay in place in the waves

Sea Level and JETS are particularly strong for holiday-proof swimming costumes that hold up session after session in both pools and the sea.

How to Choose Your Swimming Costume Size

Swimsuit sizing can vary significantly between brands. As a general guide:

• Measure your bust, waist and hips and compare against each brand's size chart
• If you're between sizes, size up for comfort in a one piece - swimming costumes should feel secure but never restrictive
• For underwired styles, use your bra size as your starting point
  
• Adjustable straps and supportive construction can help achieve the perfect fit across different body shapes

Shop our full collection of designer swimsuits and swimming costumes at Beach Cafe UK. Enjoy free UK delivery on orders over £100 and free returns.

Frequently Asked Questions

What is the difference between a swimsuit and a swimming costume?

In the UK, "swimming costume" and "swimsuit" are used interchangeably to describe a one piece swimwear garment. "Swimsuit" is slightly more common in fashion contexts, while "swimming costume" is more traditional British English. Both refer to the same thing.

Are one piece swimsuits in fashion for 2026?

Absolutely - the one piece swimming costume continues to be one of the strongest swimwear trends. From minimalist black swimsuits to bold printed styles and cut-out designs, there has never been more choice for lovers of the one piece.

What is the most flattering one piece swimsuit?

The most flattering style depends on your personal preference and body shape, but designs featuring ruching, tummy-control panels, supportive construction and thoughtful tailoring are consistently popular.

JETS is renowned for sophisticated figure-enhancing silhouettes, while Away That Day's clean lines and premium fabrics create effortlessly elegant swimsuits designed to flatter a wide range of body shapes.