US to EU Swimwear Size Conversion
| US | EU |
|---|---|
| 4 | 36 |
| 6 | 38 |
| 8 | 40 |
| 10 | 42 |
| 12 | 44 |
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 US 8 swimsuit converts to a EU 40 on the standard chart, tracking the same numbering pattern as US-to-EU dress sizing, since one-piece swimwear is typically sized on the same body-measurement basis as fitted daywear.
Swim fabric's heavy stretch content gives brands far more latitude to interpret the same size number than a rigid woven garment ever would — for a fitted one-piece specifically, check that European brand's actual bust/waist/hip chart rather than leaning on the size-number conversion alone.
Frequently asked questions
Does swimwear stretch make size conversion less reliable?
Somewhat — high-stretch swim fabric means a size can fit a small range of bodies comfortably, but different brands use different stretch percentages, so checking the brand's own measurement chart still matters.