Find your size

Our swimwear runs true to size, so choose your usual size with confidence. Because every BAÍAH top and bottom is sold separately, you can mix sizes for a perfect fit. The notes below help if you are between two sizes or choosing a structured, cupped style.

How to measure

Use a soft tape measure over bare skin or close-fitting underwear, kept level and snug without pulling tight. Measuring in front of a mirror helps.

• Bust — around the fullest part of your bust, with the tape level across your back.
• Underbust — directly beneath your bust, where a bra band sits. Helpful for our structured and underwired styles.
• Waist — around the narrowest part of your waist, usually just above the navel.
• Hip — around the fullest part of your hips and seat, standing with your feet together.

If a measurement falls between two sizes, take the larger of the two — especially for cupped or underwired tops.

Size chart

These are body measurements, not garment measurements. Shown in centimetres, with inches in brackets.

Size	UK	Bust	Waist	Hip
XS	8	80–85 cm (31–33 in)	62–67 cm (24–26 in)	88–93 cm (35–37 in)
S	10	85–90 cm (33–35 in)	67–72 cm (26–28 in)	93–98 cm (37–39 in)
M	12	90–95 cm (35–37 in)	72–77 cm (28–30 in)	98–103 cm (39–41 in)
L	14	95–100 cm (37–39 in)	77–82 cm (30–32 in)	103–108 cm (41–43 in)
XL	16	100–105 cm (39–41 in)	82–87 cm (32–34 in)	108–113 cm (43–44 in)
2XL	18	105–110 cm (41–43 in)	87–92 cm (34–36 in)	113–118 cm (44–46 in)

Fit by silhouette

Every silhouette runs true to size. These notes help you fine-tune.

Tops

• Triangle — Tamarama, Halo. Fully adjustable ties at the neck and back, our most forgiving fit. Take your usual size.
• Halter — Saní, Sirena. Sculpted and supportive with secure coverage. True to size.
• Balconette — Aurora. Underwired with fixed cups, so the fit follows your bust. Size to your bust measurement; if you are fuller in the bust or between sizes, size up.
• Plunge — Siren. Built-in cups and a deep neckline, with tie-back straps to fine-tune. True to size.

Bottoms

• Elba. Sculpted medium coverage with adjustable side straps. True to size.
• Mattina. A high-cut leg that elongates and sits high on the hip. True to size.
• Navagio. A high-rise waist with fuller coverage. True to size.

Still deciding?

Many of our product pages note the model's height and the size she is wearing, as a real-world reference. And every piece arrives with a hygiene seal: try your swimwear on over your own underwear with the seal in place, and if the fit is not right you have 14 days to return it. See our Delivery & Returns for full details.