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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 Cloudmonster 1 arrives in a striking Glacier Alloy colourway, a neutral palette of cool greys and silver tones that commands understated sophistication. The chunky, contemporary silhouette balances architectural design with functional appeal, showcasing On's distinctive Cloud cushioning technology integrated throughout the sole.
Built for presence without pretension, this sneaker combines premium construction with a visually complex profile that rewards closer inspection. The Glacier Alloy finish ensures versatility across seasonal dressing whilst maintaining the design's bold, modern character.
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.