On
On Holding AG makes performance running footwear and sportswear from Zürich, founded in 2010 by former Ironman champion Olivier Bernhard with David Allemann and Caspar Coppetti. Its patented CloudTec sole units and Speedboard plate define franchises such as Cloud 5, Cloudmonster and Cloudsurfer, alongside technical apparel, tennis and outdoor lines. Roger Federer is an investor and design collaborator. The company listed on the NYSE as ONON in 2021 and reported CHF 2.32 billion in 2024 revenue, growing via own retail, fashion collaborations and running-club marketing.
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| Category | Runs | Shape | Length | Size advice | Confidence |
|---|---|---|---|---|---|
| Hoodies & sweatshirts | true to size | regular to lightly relaxed, less body-hugging than the tees | regular with a shortish hem on some styles | Stick with your usual size, or go up one if you layer over performance tops. | low |
| Trousers & pants | slightly small | slim, tapered running and travel silhouettes | regular; some styles read slightly short or cropped at the ankle | Consider one size up if you have larger thighs, and check inseam options since lengths are limited. | low |
| Jackets | slightly small | trim performance shell cut, close through the chest and sleeve | regular, hip-length | Size up if you plan to wear a midlayer underneath. | medium |
| T-shirts & graphic tees | slightly small | slim athletic, close to the body through chest and sleeve | regular, sometimes a slightly longer back hem | Size up one if you don't want a race-fit tee. | medium |
Does On run big or small?
On fits slightly small. If you are between sizes or want anything other than a close athletic fit, take one size up in apparel; shoes are usually fine at your normal running size. On's apparel is cut on a lean Swiss/European athletic block, so most people find it a touch tighter than comparable US brands and size up one for a relaxed or layering fit, while the footwear is broadly true to length but narrow in the forefoot.
How does On fit?
On's apparel is cut on a lean Swiss/European athletic block, so most people find it a touch tighter than comparable US brands and size up one for a relaxed or layering fit, while the footwear is broadly true to length but narrow in the forefoot. Overall shape: slim, athletic performance cut with a trim chest and armhole.
How do On hoodies & sweatshirts fit?
On hoodies & sweatshirts fits true to size. Stick with your usual size, or go up one if you layer over performance tops. Shape: regular to lightly relaxed, less body-hugging than the tees.
How do On trousers & pants fit?
On trousers & pants fits slightly small. Consider one size up if you have larger thighs, and check inseam options since lengths are limited. Shape: slim, tapered running and travel silhouettes.
How do On jackets fit?
On jackets fits slightly small. Size up if you plan to wear a midlayer underneath. Shape: trim performance shell cut, close through the chest and sleeve.
Directional fit consensus summarized from public sources with AI — a starting point, not a guarantee. Confirm with the product's own measurements before buying.
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