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| UK | EU | US | Foot length |
|---|---|---|---|
| UK 5.5 | 38.5 | US 6 | 23.7 cm |
| UK 6 | 39 | US 6.5 | 24.1 cm |
| UK 6 | 40 | US 7 | 24.5 cm |
| UK 6.5 | 40.5 | US 7.5 | 25.0 cm |
| UK 7 | 41 | US 8 | 25.4 cm |
| UK 7.5 | 42 | US 8.5 | 25.8 cm |
| UK 8 | 42.5 | US 9 | 26.2 cm |
| UK 8.5 | 43 | US 9.5 | 26.7 cm |
| UK 9 | 44 | US 10 | 27.1 cm |
| UK 9.5 | 44.5 | US 10.5 | 27.5 cm |
| UK 10 | 45 | US 11 | 27.9 cm |
| UK 10.5 | 45.5 | US 11.5 | 28.3 cm |
| UK 11 | 46 | US 12 | 28.8 cm |
| UK 11.5 | 47 | US 12.5 | 29.2 cm |
| UK 12 | 47.5 | US 13 | 29.6 cm |
| UK 12.5 | 48 | US 13.5 | 30.0 cm |
| UK 13 | 48.5 | US 14 | 30.5 cm |
Conversion shown for On. All sizes on this page are UK — pick your UK size above. Full size guide ›
The ON Cloudrunner 3 in Black Black presents a refined aesthetic that speaks through restraint. This monochromatic execution delivers understated sophistication, with the shoe's contemporary silhouette rendered in a consistent dark palette that pairs with virtually everything.
Designed for responsive daily wear, the Cloudrunner 3 balances performance engineering with a clean visual language. The all-black treatment emphasizes form over decoration, creating a versatile piece that transcends typical athletic footwear categories.
Every pair is brand new and unworn, supplied in its original box. Nothing we sell is used, worn or ex-display — just deadstock, ready to wear.
Every pair is verified 100% authentic in-house before it ships — checked against known-authentic references for materials, stitching, labelling and box details.
Fast UK tracked delivery, with next-day options at checkout. Orders are dispatched securely and double-boxed to protect the shoe box in transit.
Not the perfect fit? Enjoy hassle-free 30-day returns & exchanges. Full details on our Shipping Policy.