O'Neill Women's Size Chart
Complete women's sizing guide for O'Neill with measurements, fit tips, and conversions
Use this women size chart to compare your measurements against O'Neill's official sizing. Each table shows body measurements and international conversions.
Fit Summary
O'Neill uses European sizing for all their products. Their wetsuits and boardshorts run true to size. Casual clothing has a relaxed, surf-inspired fit that's comfortable for an active lifestyle.
Last updated: Q3 2026 · Reviewed quarterly by JC, SizeHub editor
Women's Sizing
Tops & Shirts
| Size | XS | S | M | L | XL | 2XL |
|---|---|---|---|---|---|---|
| EU | 34 | 36 | 38 | 40 | 42 | 44 |
| Chest (in) | 31.9-33.1 | 33.9-35.0 | 35.8-37.0 | 37.8-39.0 | 39.8-40.9 | 41.7-43.7 |
Shoes
| EU | 36 | 37 | 38 | 39 | 40 | 41 | 42 |
|---|---|---|---|---|---|---|---|
| Foot (in) | 9.4 | 9.7 | 10.0 | 10.2 | 10.5 | 10.8 | 11.0 |
Shopping Tips
For O'Neill wetsuits, getting the right size is crucial — check height AND weight charts. Their boardshorts are designed to sit at the waist. European sizes are used even in US markets.
Size Comparison
O'Neill fits similarly to Quiksilver and Billabong. Compared to Hurley, O'Neill has a slightly more European/slim cut in casual wear.
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Frequently Asked Questions
Does O'Neill run small?
O'Neill uses European sizing which may feel slightly smaller than US brands. Check their conversion chart and consider sizing up if between sizes.
How do I size O'Neill wetsuits?
Use both height and weight to determine your wetsuit size. A properly fitting wetsuit should be snug without restricting breathing.
How to Measure
Chest
Measure around the fullest part of your chest, keeping the tape horizontal.
Waist
Measure around your natural waistline, keeping the tape comfortably loose.
Hips
Stand with feet together and measure around the fullest part of your hips.