EU to US Swimwear Size Conversion
| EU | US |
|---|---|
| 36 | 4 |
| 38 | 6 |
| 40 | 8 |
| 42 | 10 |
| 44 | 12 |
Sizing conventions vary by brand and by cut — this table shows the standard published conversion. Always check the garment's own size chart when one is available. See how these tables are compiled.
A EU 42 swimsuit matches a US 10 on the standard chart — useful for lining up a European-brand swimsuit against a US size you already know fits well.
Because cut varies enormously between a structured underwire one-piece and a soft bralette-style top, this size-number conversion is a starting point rather than a guarantee, more so than for most other garment categories on this site.
Because swim fabric construction varies so much between a structured underwire piece and a soft, unlined one, this converted number is worth treating as a first guess rather than a guarantee for a swimsuit bought without trying it on.
Frequently asked questions
Is swimwear size conversion less precise than other clothing categories?
Generally yes — swim fabric stretch and very different construction styles (structured vs. soft) mean the same converted size number can fit noticeably differently depending on the swimsuit's build.