In its US sizing scheme, most On Running shoes run true to size compared to other popular brands.
But before going with your accustomed shoe size, we still recommend measuring your foot length. Studies show that nearly 70% of people are walking around in ill-fitted footwear.
Tip: If you happen to fall between sizes. choose the larger one.
On men's and women's size chart
Buying a waterproof shoe? Go a size up
The brand recommends getting a larger size (+1 US size from your regular one) in its waterproof models. That's because they tend to fit on the snug side.
Fit and sizing of On shoes
As much as any brand may attempt to keep sizing consistent for all models, variances still occur. Materials, design elements, and overall construction all have an impact on fit and sizing.
In such cases, the brand itself recommends sizing up or down, depending on the model. Here are a few examples:
- On Cloud - go US 0.5 bigger
- On Cloud X - go true to size
- On Cloudflow - go true to size
- On Cloudswift - go US 0.5 bigger
For more information about the other On models, see our respective product pages.
On shoe sizes compared to other brands
On appears to be consistent with most major running shoe brands, including Saucony, Brooks, ASICS, New Balance, and Hoka.
However, there can be half-a-size to full-size discrepancies with Nike and Adidas.
| Foot length (mm) | On | Saucony | Brooks | ASICS | New Balance | Hoka | Nike | Adidas |
| Men's US sizes | ||||||||
| 260 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 |
| 270 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 |
| 280 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 |
| Women's US sizes | ||||||||
| 230 | 6 | 5 | 6 | 6 | 6 | 6 | 6.5 | 6.5 |
| 240 | 7 | 6 | 7 | 7 | 7 | 7 | 7.5 | 7.5 |
| 250 | 8 | 7 | 8 | 8 | 8 | 8 | 8.5 | 8.5 |
Have a shoe from another brand that fits you well? See the conversion tool at the bottom of the page to find out its equivalent in On sizes.
