Black Friday - best deals from 49 stores Comparing On shoe sizes to 40+ other athletic shoe brands, we found that its sizing scheme is consistent with the industry average.
But before going with your accustomed shoe size, we recommend measuring your foot length because 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
Fit and sizing of On shoes
Even though most On shoes run true to size, deviations still occur. Materials, design elements, and overall construction all have an impact on the fit and sizing of each shoe.
Sometimes you will find that the brand itself recommends getting a half size bigger in certain silhouettes. From our end, we measure the internal length and the toebox dimensions of each On shoe. For example, we found that the widest part of the toebox ranges from 95 to 105 mm in our lab-tested On shoes.
Please have a look at our comprehensive lab reviews to find more information on the fit, sizing, and other aspects of shoes from the Swiss brand.
Wide widths in On shoes
On offers some of its popular road running shoes in an alternative Wide width. These include the Cloudrunner, the Cloudsurfer, and the Cloudgo.
On shoe sizes compared to other brands
On appears to be consistent with most major running shoe brands, including Nike, Adidas, New Balance, and Hoka.
| Shoe length (MM) | On | Nike | Adidas | New Balance | Hoka |
| Men's US sizes | |||||
| 270 | 9 | 9 | 9 | 9 | 9 |
| 280 | 10 | 10 | 10 | 10 | 10 |
| 290 | 11 | 11 | 11 | 11 | 11 |
| Women's US sizes | |||||
| 230 | 6 | 6.5 | 6 | 6 | 6 |
| 240 | 7 | 7.5 | 7 | 7 | 7 |
| 250 | 8 | 8.5 | 8 | 8 | 8 |
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.
