Size Guide
UK Footwear Size Guide
Use this table as a general guide. Fit can vary slightly by brand and style. Product-specific guidance takes priority where shown.
| UK size | EU size | US size | Foot length |
|---|---|---|---|
| 3 | 36 | 5 | 22.0 cm |
| 3.5 | 36.5 | 5.5 | 22.5 cm |
| 4 | 37 | 6 | 23.0 cm |
| 4.5 | 37.5 | 6.5 | 23.5 cm |
| 5 | 38 | 7 | 24.0 cm |
| 5.5 | 38.5 | 7.5 | 24.5 cm |
| 6 | 39 | 8 | 25.0 cm |
| 6.5 | 40 | 8.5 | 25.5 cm |
| 7 | 40.5 | 9 | 26.0 cm |
| 7.5 | 41 | 9.5 | 26.5 cm |
| 8 | 42 | 10 | 27.0 cm |
| 8.5 | 42.5 | 10.5 | 27.5 cm |
| 9 | 43 | 11 | 28.0 cm |
| 9.5 | 43.5 | 11.5 | 28.5 cm |
| 10 | 44 | 12 | 29.0 cm |
| 10.5 | 44.5 | 12.5 | 29.5 cm |
How to measure
- Measure at the end of the day while wearing the type of socks you expect to use.
- Stand on paper with your heel against a wall.
- Mark the tip of the longest toe and measure from the wall.
- Measure both feet and use the longer measurement.
Between sizes?
Choose the smaller size for a closer fit or the larger size for a more relaxed fit. For wide feet, consider the larger option where available.
Wrong size?
Eligible UK size exchanges and returns are free. Email contact@magiels.com before returning an item.
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 delivery across the UK with no minimum spend. Orders are processed within 1–2 business days and delivered within 5–7 business days. We’ll email you a tracking number as soon as your order has been dispatched.
Shop with confidence. If your purchase isn’t right for you, you can return it free of charge within 30 days of delivery and request a refund. Once your return has been received and inspected, the refund will be issued to your original payment method.
