When it comes to running shoes, fit is everything. A perfect-fitting shoe not only boosts your performance but also prevents injury and discomfort. If you’re eyeing a pair from On Running, understanding their sizing and fit can save you from common buying mistakes.
Whether you’re a first-time buyer or upgrading your old pair, this On Running size guide will help you find the right match for your feet.
Why Fit Matters in On Running Shoes
The right fit in On Running shoes ensures:
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Improved stability and support
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Reduced risk of blisters and toe pain
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Enhanced performance and stride efficiency
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Long-term durability and comfort
On Running uses CloudTec® technology for impact protection and energy return, so getting the size wrong can affect the feel and effectiveness of the cushioning.
How On Running Shoes Fit Compared to Other Brands
Do On Running Shoes Run True to Size?
In general, On Running shoes fit true to size. However, some models may feel slightly narrower or snug, especially if you have wide feet. Here’s a quick comparison with other popular running brands:
| Brand | Fit Compared to On Running |
|---|---|
| Nike | Slightly narrower |
| Adidas | Similar in length |
| ASICS | Roomier toe box |
| HOKA | More cushioned, looser fit |
Tip: If you’re between sizes, going half a size up in On Running shoes is often recommended.
Step-by-Step Guide to Measure Your Foot for On Running Shoes
1. Trace Your Foot
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Place your foot flat on a piece of paper.
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Trace around it with a pencil or pen.
2. Measure the Length
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Use a ruler to measure from your heel to the longest toe.
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Add 0.5–1 cm for toe space (ideal for running comfort).
3. Compare With On Running Size Chart
Use On Running’s official size chart to match your foot length to the right shoe size. Most models are available in both US, UK, and EU sizes.
Understanding Width and Toe Box in On Running
On Running shoes are known for a snug midfoot fit and a moderate toe box. If you have wider feet, consider these models:
Best On Running Shoes for Wide Feet
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Cloudstratus – More room in the forefoot
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Cloudace – Extra cushioning and wider fit
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Cloudflyer – Good for stability and arch support
Pro Tip: Try them on with the socks you usually run in, as thicker socks can change the feel of the fit.
Breaking in Your New On Running Shoes
Unlike some brands, On Running shoes require minimal break-in time. However, here are a few things to keep in mind:
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Wear them around the house for short periods first.
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Use them for short runs before longer distances.
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If there’s persistent discomfort after a week, try a different size or model.
Common Fit Issues and Fixes
Heel Slippage
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Solution: Use a heel lock lacing technique.
Tight Toe Box
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Solution: Switch to a model with more toe room or size up.
Arch Discomfort
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Solution: Consider adding custom or high-arch insoles.
When to Replace Your On Running Shoes
Even the best-fitting shoes wear out over time. Replace your On Running shoes every 400–500 km (250–300 miles) to maintain performance and support.
Watch out for:
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Uneven tread wear
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Compressed cushioning
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Increased joint or foot pain
Final Thoughts: The Perfect Fit for Peak Performance
Getting the right size in your On Running shoes is essential—not just for comfort, but for every run, walk, and workout in between. Measure accurately, consult the size chart, and don’t be afraid to test out different models until you find your perfect fit.
Because when your shoes fit right, you don’t just run—you fly.
