Fit
Size guide
Every bikini top and bikini bottom is sold on its own, so you can choose each half in the size that fits. All measurements below are body measurements in centimetres, not garment measurements.
Swimwear size chart
| Size | Bust | Underbust | Waist | Hips | US | UK / AU | EU |
|---|---|---|---|---|---|---|---|
| XS | 78–82 | 65–69 | 60–64 | 86–90 | 2 | 6 | 34 |
| S | 82–86 | 69–73 | 64–68 | 90–94 | 4 | 8 | 36 |
| M | 86–92 | 73–78 | 68–74 | 94–100 | 6–8 | 10–12 | 38–40 |
| L | 92–98 | 78–84 | 74–80 | 100–106 | 10 | 14 | 42 |
| XL | 98–104 | 84–90 | 80–86 | 106–112 | 12 | 16 | 44 |
How to measure
- Bust: around the fullest part of your chest, tape level across your back.
- Underbust: directly under the bust, snug but not tight. This matters most for the Eclipse Balconette and the Corona Longline, which have fixed bands.
- Waist: around the narrowest part of your torso.
- Hips: around the fullest part of your hips, feet together.
Choosing a top
Choose tops by bust. Triangle tops (Halo, Nova, Comet) and the Apogee halter tie at the neck and back, so they adjust well between sizes. Pieces with a fixed band — Eclipse, Corona, Equinox, Zenith, Perigee — follow the underbust more closely: if you are between sizes, take the larger one.
Choosing a bottom
Choose bottoms by hips. Tie-side and string styles (Halo, Nova) adjust at the hip. The Saturn High-waist and Zenith Fold-over sit at or near the waist; check your waist measurement as well.
One-pieces
One-pieces depend on torso length as much as width. If your bust and hips fall into different sizes, choose by the larger measurement. Adjustable straps on the Eclipse Plunge give extra room in length.
Cover-ups and pouches
Cover-ups are cut loose. S fits sizes XS–S, M fits M and L fits L–XL. Sarongs, the beach shirt and the kaftan are one size and fit XS to XL. Pouch sizes are given on each product page.
Still unsure?
Send us your measurements and the pieces you are looking at, and we will suggest a size: support@orbavie.shop. Remember you can try swimwear on at home over your underwear with the hygiene liner in place — see Returns & Refunds.