Who says that a small bust means fewer options when it comes to swimwear? Quite the opposite! With an A or B cup, the possibilities are endless: almost any cut is possible, without ever having to sacrifice style.
In this guide, discover invaluable advice on how to enhance your figure, inspired by the expertise of beach lingerie specialists. Find out which swimwear models are best for small breasts.
The different styles for small breasts
A small cup offers that unique versatility that allows you to oscillate between sophistication and daring, especially when choosing a swimming costume for a small bust that enhances the silhouette.
Let’s take a look at how to make the most of this feature to create looks that impress.
Two-piece swimwear
The triangle bikini is still a must-have for small breasts. Its minimalist cut moulds perfectly to the shape of your breasts without crushing them, creating a naturally elegant neckline. A tip from the professionals? Opt for adjustable ties that allow you to adjust the coverage to the nearest millimetre. Some brands even offer slightly padded triangles for a ‘just right’ effect.
Push-up models have evolved since their early days, when they were sometimes too artificial. New balconette technologies now offer a subtle curve that enhances the bust without exaggeration. The secret lies in the slightly inward-sloping cups, a detail that makes all the difference.
As for bandeaux, designers are making a strong comeback. The key? Choose versions with slight built-in padding and removable straps. That way, you can enjoy the iconic style of the bandeau with the assurance of optimum support, even during the most active swims.
One-piece swimwear
Contrary to popular belief, one-piece swimwear can be an unexpected ally for small breasts. Today’s designers compete in ingenuity with strategic cut-outs that enhance the bust. Sheathed plunging necklines, for example, offer discreet support while creating a visually flattering illusion of depth.
Asymmetry is the key trend for the 2025 collections. One-shoulder styles and geometric cut-outs add a modern edge to the silhouette. And for those who prefer to put the accent elsewhere, sculptural backs offer a seductive alternative that rebalances proportions with elegance.
Cuts to avoid
Some swimwear styles can actually minimise a small bust. Sporty, ultra-covering swimming costumes with no particular structure tend to flatten the bust. Similarly, cups that are too large create an unattractive ‘empty’ effect, while sizes that are too small crush the bust.
The solution? Find that happy medium where the fabric hugs your curves without constricting them.
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How do you enhance a small bust?
Playing with volumes, textures and optical illusions can create surprising effects.
Here are the stylists’ favourite techniques for magnifying small breasts in swimwear.
Techniques for adding volume
Ruffles and ruching are not just decorative elements. Strategically placed on the bust, they create a visual movement that gives the impression of a fuller bust. The trick is to choose ruffles that are proportionate: neither too imposing nor too discreet for a natural result.
The slightly curved underwires of modern push-ups offer a more structured alternative. Their secret? Shells that slope slightly towards the centre to create a harmonious neckline without an overly pronounced ‘cup’ effect.
Play with details and embellishments
Tactical embellishments work wonders on small breasts. Sequins, pearls or embroidery placed on the upper part of the cup draw the eye towards the décolletage. Geometric prints or subtle horizontal stripes create a cleverly calculated optical illusion.
An original strap or a metallic detail can be enough to transform a simple swimming costume into a statement piece. Today’s designers play with these elements to direct the eye towards the assets of each body type.
The importance of good measurements
A well-fitted swimming costume makes 80% of the difference. For small cups, every centimetre counts. Measure your bust measurement (under the bust) and your bust measurement (at the fullest point) without tightening the tape measure. The difference between these two measurements determines your cup size.
A concrete example? A bust measurement of 75 cm and a bust measurement of 85 cm generally corresponds to a B cup. But be aware that each brand has its own specific characteristics, which is why it’s important to always consult the size guides.
Tips for choosing the right size
The golden rule? Never buy without consulting the brand’s size guide. A B cup from one brand may correspond to an A cup from another. Experts recommend taking measurements every year, as our body shape often changes without us realising it.
So having a small bust is not a limitation, but an opportunity to play with a wide range of styles! The 2025 trends offer just such a diversity of cuts, so that every body shape can find something to suit it.
Whether you opt for a minimalist triangle or an architectural one-piece, the important thing is to choose a model in which you feel comfortable and confident. After all, the real secret of a good swimming costume isn’t measured in centimetres, but in smiles when you look in the mirror.
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