On Cloud Boom, Echo, White, and Black
£150.00 £120.00
The Cloudboom Echo in White and Black is a race-ready shoe that looks the part. A clean white mesh upper with a bold black On logo dominating the side panel and black laces creates a sharp two-tone profile, while a pale green CloudTec midsole with its segmented pods adds a subtle fresh detail at the bottom that ties the colorway together. Lightweight construction and a propulsive rockered sole geometry make every stride feel faster and more efficient from the first step to the finish.
On Cloud Shoes Size Guide
On Cloud trainers use standard On sizing and most styles fit true to size, so we recommend ordering your usual UK size. If you are between sizes, or looking at a chunkier model like the Cloudmonster or Cloud 5, we suggest going up half a size for extra room in the toe.
Men's Size Chart
| UK | EU | US | Foot Length (cm) |
|---|---|---|---|
| 6.5 | 40 | 7 | 25.0 |
| 7 | 40.5 | 7.5 | 25.5 |
| 7.5 | 41 | 8 | 26.0 |
| 8 | 42 | 8.5 | 26.5 |
| 8.5 | 42.5 | 9 | 27.0 |
| 9 | 43 | 9.5 | 27.5 |
| 9.5 | 44 | 10 | 28.0 |
| 10 | 44.5 | 10.5 | 28.5 |
| 10.5 | 45 | 11 | 29.0 |
| 11 | 46 | 11.5 | 29.5 |
| 11.5 | 46.5 | 12 | 30.0 |
| 12.5 | 47.5 | 13 | 31.0 |
| 13 | 49 | 14 | 32.0 |
Women's Size Chart
| UK | EU | US | Foot Length (cm) |
|---|---|---|---|
| 3.5 | 36 | 5 | 22.0 |
| 4 | 37 | 5.5 | 22.5 |
| 4.5 | 38 | 6 | 23.0 |
| 5 | 38.5 | 6.5 | 23.5 |
| 5.5 | 39 | 7 | 24.0 |
| 6 | 40 | 7.5 | 24.5 |
| 6.5 | 41 | 8 | 25.0 |
| 7 | 42 | 8.5 | 25.5 |
| 7.5 | 42.5 | 9 | 26.0 |
| 8 | 43 | 9.5 | 26.5 |
| 8.5 | 44 | 10 | 27.0 |
How to Measure Your Foot
Place a sheet of paper on the floor against a wall. Stand on it with your heel touching the wall. Mark the tip of your longest toe, then measure from the wall to the mark in centimetres. Match that number to the Foot Length column above. If you land between two sizes, choose the larger one.
Fit Notes
On Cloud shoes fit true to length but can feel slightly narrow in the toe box. If you have wider feet, some models such as the Cloudrunner, Cloudsurfer and Cloudgo come in a Wide fit. Measure both feet and use the larger measurement, since most people have one foot slightly bigger than the other.

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