O'Neills Sizing Guide
Men's Size Conversion Chart
| UK Size | US Size | EU Size | Chest (inches) |
|---|---|---|---|
| S | 34-36 | 44-46 | 37-38 |
| M | 38-40 | 48-50 | 39-40 |
| L | 42-44 | 52-54 | 41-42 |
Sizing Recommendations
Use these size charts as a general guide. Sizes may vary between different styles and cuts. For the best fit, measure your body and compare to the specific garment measurements.