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SIZE GUIDE
SIZE GUIDE (TRUE TO SIZE)
| UK Size | EU Size | US Size | Foot Length (cm) |
|---|---|---|---|
| 3 | 36 | 5 | 22.0 |
| 3.5 | 36.5 | 5.5 | 22.5 |
| 4 | 37 | 6 | 23.0 |
| 4.5 | 37.5 | 6.5 | 23.5 |
| 5 | 38 | 7 | 24.0 |
| 5.5 | 38.5 | 7.5 | 24.5 |
| 6 | 39 | 8 | 25.0 |
| 6.5 | 40 | 8.5 | 25.5 |
| 7 | 40.5 | 9 | 26.0 |
| 7.5 | 41 | 9.5 | 26.5 |
| 8 | 42 | 10 | 27.0 |
| 8.5 | 42.5 | 10.5 | 27.5 |
| 9 | 43 | 11 | 28.0 |
| 10 | 44 | 12 | 29.0 |
| 10.5 | 44.5 | 12.5 | 29.5 |
BETWEEN TWO SIZES?
For a tighter fit: choose one size down.
For a more relaxed fit: choose one size up.
HOW TO MEASURE
1. Length: Measure the distance from the tip of your longest toe to the back of your heel.
WRONG SIZE OR COLOUR?
On Running Cloudboom Volt Women's Race Day Shoes
The Cloudboom Volt is built for one thing: race day performance. Ultra-lightweight, explosive, and engineered to help you hit a new PB — this is On Running at its most focused and technical.
Key Features
- Ultra-lightweight construction — engineered to minimise dead weight
- CloudTec® Phase™ system for smooth, powerful energy transfer
- Carbon fibre-inspired Speedboard® for maximum propulsion
- Breathable mesh upper for ventilation at race pace
- Available in white/black colourway
Every Gram Counts
The Cloudboom Volt is for runners who are serious about their finish times. Whether you're targeting a 5K, 10K, half marathon, or full marathon — this shoe is engineered to give you an edge. Fast, responsive, and beautifully designed.
Material: Lightweight mesh upper | CloudTec® Phase™ sole
Fit: True to size — order your usual UK size
Enjoy FREE shipping across the UK, with no minimum spend required. Orders are processed within 1–2 business days and delivered by Royal Mail in 5–7 business days. Once your order has been dispatched, you'll receive a tracking number so you can follow your delivery every step of the way.
Shop with complete confidence. If you're not completely satisfied with your purchase, you can return it free of charge within 30 days of delivery for a full refund. Returns are simple and hassle-free, and refunds are issued to your original payment method once your return has been received and inspected.
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