On Running Women's Size Guide
On Running Women's Size Guide
Fit Summary
On Running is a Swiss premium performance running & outdoor brand using EU sizing as base standard for women’s tops. Women’s styles include running tees, performance tanks, technical base layers, lightweight hoodies and studio knit tops, available in Close, Regular and Relaxed silhouettes. Regular-fit styles generally run true to size; Close-fit performance layers hug the body for unrestricted athletic movement, while relaxed studio and casual tops offer comfortable room. Technical tops use 4-way stretch functional fabric; cotton blend jersey pieces have soft elasticity. Fit varies noticeably between second-skin running base layers and relaxed everyday casual tops. Shoppers preferring looser fit are recommended to size up for close-cut technical styles.
Similar sizing reference: Swiss performance womenswear sizing, running and trail focused; close-fit technical styles are tailored, regular cuts follow standard EU sizing.
Note: UK / EU / AU / CN‑Size marked "≈" are approximate conversions for reference only. This guide covers women’s tops only; bottoms, dresses and outerwear are not included. Actual garment fit depends on fabric and silhouette.
| Intl | US | UK ≈ | EU ≈ | AU ≈ | CN国标号型 ≈ | Bust(cm) | Bust(in) |
|---|---|---|---|---|---|---|---|
| XS | 0-2 | 4-6 | 34 | 6 | 155/80A | 82 | 32.3 |
| S | 2-4 | 6-8 | 36 | 8 | 160/84A | 86 | 33.9 |
| M | 6-8 | 10-12 | 38 | 10 | 165/88A | 92 | 36.2 |
| L | 10-12 | 14 | 40 | 12 | 170/92A | 98 | 38.6 |
| XL | 14-16 | 16 | 42 | 14 | 175/96A | 106 | 41.7 |
Last updated: Q3 2026 · Reviewed quarterly by SizeHub editor | Source: On Running official size guide reference
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