Size confidence
Size guide for swimwear and activewear
Use this as a starting point. Brands cut differently, and a swimsuit with 20% elastane behaves nothing like one with 8%. Measure yourself once, write the numbers down, then compare against each brand chart.
Get a starting size
This is a measurement estimate, not a fit guarantee. Check the brand chart and reviews for stretch before ordering.
Swimsuit size chart (cm)
Standard conversion used by most swimwear brands. If you are between sizes, go up for one-pieces and down for high-compression bikinis.
| Size | Bust | Waist | Hip | UK | US | EU |
|---|---|---|---|---|---|---|
| XS | 76-81 | 58-63 | 84-89 | 6 | 2 | 34 |
| S | 81-86 | 63-68 | 89-94 | 8 | 4 | 36 |
| M | 86-91 | 68-73 | 94-99 | 10 | 6 | 38 |
| L | 91-97 | 73-79 | 99-105 | 12 | 8 | 40 |
| XL | 97-103 | 79-85 | 105-111 | 14 | 10 | 42 |
| XXL | 103-110 | 85-92 | 111-118 | 16 | 12 | 44 |
Measure over the body
Wear a fitted top and no shoes. Keep the tape level and snug, not tight. Measure bust at the fullest point, waist at the narrowest, hip at the widest.
Stretch changes the answer
Swim fabric with 20% elastane forgives a size; a 6% spandex one-piece does not. Compression leggings run true to size but can feel tight at the waistband.
Between sizes
Go up for one-pieces and structured workwear; go down only for high-compression activewear where the chart says to.