The Best One-Shoulder Swimsuits

There is a particular kind of confidence that arrives the moment you put on a one-shoulder swimsuit. It is the swimwear equivalent of an asymmetric neckline at a black-tie dinner — quietly assured, a little subversive, and far more flattering than it has any right to be. The single strap draws the eye along a diagonal, lengthens the torso, and frames the shoulders in a way that feels deliberate rather than decorative. Small wonder it has become the silhouette the fashion set reaches for first, from the rocks of Capri to the infinity pools of Mykonos.

The trouble, of course, is that not all one-shoulder suits are created equal. A poorly engineered strap slips, a thin fabric sags by the second swim, and a badly cut leg-line undoes all that elegant geometry. So we have done the editing for you. Below, the one-shoulder swimsuits we would actually pack — the labels that understand that a single shoulder still needs proper support, considered seams, and fabric that earns its keep. Consider this your shortcut to the good stuff, pulled straight from the edit.

Hunza G — The One-Shoulder Everyone Recognises

If the one-shoulder swimsuit has a patron saint, it is Hunza G. The London label's signature crinkle-stretch fabric does something faintly miraculous: it expands to fit a remarkable range of bodies — the brand cheekily quotes a UK 6 to 16 in a single size — while gently smoothing everything it touches. The Nadine one-shoulder, with its sculpted single strap and that addictive seersucker texture, has become a genuine cult object, photographed on every shoreline worth knowing. It dries in minutes, never bobbles, and somehow looks more expensive than its price suggests. If you buy one suit from this list, make it this. Shop Hunza G

Monday Swimwear — For Proper Support

For those who want their swimwear to do some actual lifting — particularly anyone in a D-cup and beyond — Monday Swimwear is the answer. Founded by the women behind one of fashion's most-followed swim accounts, the label is obsessive about fit, and its one-shoulder styles come with the kind of internal structure usually reserved for evening wear. Think hidden support, secure straps that stay put through a real swim, and a leg-line cut to flatter rather than to startle. The fabric is thick, matte, and beautifully opaque. This is the suit you wear when you intend to dive in, not merely recline beside the water. Shop Monday Swimwear

Vitamin A — Understated California Polish

Vitamin A makes the one-shoulder swimsuit for the woman who would rather not look as though she is trying. Cut in the label's recycled EcoLux fabric — a smooth, sustainable jersey that hugs without clinging — its asymmetric one-pieces lean clean and architectural, all sun-bleached neutrals and quietly perfect proportions. There is no logo shouting, no needless hardware; just a single strap, an immaculate seam, and a colour palette that flatters a tan. It is the swimwear answer to a good white shirt: endlessly wearable, never out of place, and rather more thoughtful about the planet than most. Shop Vitamin A

Frankies Bikinis — A Little More Drama

When the occasion calls for something with a touch more theatre, Frankies Bikinis delivers. The cult California label has built a following on prints you remember and details you don't see coming — a ruched shoulder, a delicate ruffle running the length of the strap, a high-cut leg engineered to flatter. Its one-shoulder one-pieces are unapologetically pretty, the sort of thing that photographs as well at golden hour as it does in the sea. If your holiday wardrobe runs to the romantic — think floaty linen and a slick of bronzer — this is your label. Shop Frankies Bikinis

Melissa Odabash — Resort Glamour, Properly Done

No discussion of the one-shoulder swimsuit is complete without Melissa Odabash, the British designer whose suits have been a fixture of the European resort circuit for two decades. Her one-shoulder styles are pure old-world glamour: gold hardware that catches the light, gathered detailing that nips the waist, and a finish polished enough to carry you from sunlounger to lunch with nothing more than a kaftan thrown over the top. The fabrics are luxurious, the construction is impeccable, and the overall effect is unmistakably grown-up. This is one-shoulder swimwear for the woman who books the better hotel. Shop Melissa Odabash

L*Space — The Best Value Splurge

Finally, for the one-shoulder suit that delivers a designer feel without the most punishing price tag, L*Space is hard to beat. The label's signature Sensual Solids fabric is doubly lined, beautifully smooth, and famously sculpting — it skims the midsection and holds its shape swim after swim. Its asymmetric one-pieces strike a clever balance between minimal and flattering, with clean lines and a leg-cut that lengthens without exposing. It is the kind of suit you reach for again and again, season after season, which is rather the point. Shop L*Space

How to Wear It: Fit and Styling Notes

A one-shoulder swimsuit lives or dies by its strap, so start there. The single shoulder bears all the work of holding the suit in place, which means the strap should feel secure but never bite — if it digs in standing still, it will only get worse in the water. Larger busts should look for styles with internal support or adjustable strapping rather than a flat, unstructured band; this is where labels like Monday Swimwear earn their reputation.

For styling, lean into the asymmetry rather than fighting it. A single drop earring on the bare-shoulder side, hair swept up or to the opposite side, and a delicate chain are all it takes to make the silhouette sing. Layer a sheer kaftan or an oversized linen shirt over the top for lunch, and let one shoulder peek out. Above all, resist the urge to over-accessorise — the whole charm of the one-shoulder suit is that it does the heavy lifting on its own. Get the fit right, and it will be the most worn, most photographed thing in your case. For more, browse the rest of the edit.