On Running bottoms fit true to size. True to size. Running shorts and tights fit as expected.
Bottoms notes
Get a personal size recommendation for On Running bottoms, accounts for the brand's cut tendency and your saved measurements.
GENERAL BRAND GUIDANCE
This is a general brand-level sizing summary, not an exact product recommendation. For your specific size, paste a product link into the fit checker.
On Running bottoms fit true to size. True to size. Running shorts and tights fit as expected.
Best starting point
Your usual size should fit well in On Running bottoms.
Cut note
True to size.
Examples
Think jeans, trousers, skirts, and shorts.
Start at your usual size in On Running bottoms, then use the cut note below to choose neater or roomier. Sizing stays consistent across On Running bottoms, so once you find your size it holds.
Choose the slimmer feel
Stay at your usual size for a clean fit, especially if the piece reads as standard cuts.
Choose the roomier feel
Size up only if you want extra ease or prefer this category to feel softer than typical standard cuts.
Variability and caveats
Cut
Cut matters most when a piece is intentionally tailored or intentionally oversized.
Fabric stretch
Fabric stretch changes how strongly the sizing tendency shows up: more give softens it, less give makes it more obvious.
Styling
This brand is fairly consistent, but styling can still shift the feel when a piece is meant to be sharply fitted or deliberately oversized.
Compare measurements side-by-side using the label rows below.
| Size | Waist | Hips | EU | UK |
|---|---|---|---|---|
XS | 24–26" | 34–36" | 32-34 | 4-6 |
S | 26–28" | 36–38" | 36 | 8 |
M | 28–30" | 38–40" | 38-40 | 10-12 |
L | 30–32" | 40–42" | 42 | 14 |
XL | 32–34" | 42–44" | 44 | 16 |
Measurements are shown in inches where numeric values are available.
On Running bottoms are usually true to size.
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