Adidas to On shoe size
The short answer
adidas 7.5 is On 7 or 7.5 by the two brands' own charts. 12 of 17 adidas sizes land on a different label at On.
Both brands publish the foot length each size is built for, so every row matches a foot, not a label.
On 2 sizes the charts land two or more sizes from the same label. Brands do not measure the body the same way, so on those rows treat the chart answer and the same label as the two ends of a range.
| adidas | adidas builds it for | On, by chart | Same label | On builds it for | On also prints |
|---|---|---|---|---|---|
| 5 | foot length 22.1 cm | 5 | 5 | foot length 22 cm | UK 3 · EU 36 · CM / JP 22 |
| 5.5 | foot length 22.5 cm | 5.5 | 5.5 | foot length 22.5 cm | UK 3.5 · EU 36.5 · CM / JP 22.5 |
| 6 | foot length 22.9 cm | 6 | 6 | foot length 23 cm | UK 4 · EU 37 · CM / JP 23 |
| 6.5 | foot length 23.3 cm | 6.5 or 6 | 6.5 | foot length 23.5 cm | UK 4.5 · EU 37.5 · CM / JP 23.5 |
| 7 | foot length 23.8 cm | 7 or 6.5 | 7 | foot length 24 cm | UK 5 · EU 38 · CM / JP 24 |
| 7.5 | foot length 24.2 cm | 7 or 7.5 | 7.5 | foot length 24 cm | UK 5 · EU 38 · CM / JP 24 |
| 8 | foot length 24.6 cm | 7.5 | 8 | foot length 24.5 cm | UK 5.5 · EU 38.5 · CM / JP 24.5 |
| 8.5 | foot length 25 cm | 8 | 8.5 | foot length 25 cm | UK 6 · EU 39 · CM / JP 25 |
| 9 | foot length 25.5 cm | 8.5 | 9 | foot length 25.5 cm | UK 6.5 · EU 40 · CM / JP 25.5 |
| 9.5 | foot length 25.9 cm | 9 | 9.5 | foot length 26 cm | UK 7 · EU 40.5 · CM / JP 26 |
| 10 | foot length 26.3 cm | 9.5 or 9 | 10 | foot length 26.5 cm | UK 7.5 · EU 41 · CM / JP 26.5 |
| 10.5 | foot length 26.7 cm | 9.5 or 10 | 10.5 | foot length 26.5 cm | UK 7.5 · EU 41 · CM / JP 26.5 |
| 11 | foot length 27.1 cm | 10 | 11 | foot length 27 cm | UK 8 · EU 42 · CM / JP 27 |
| 11.5 | foot length 27.6 cm | 10.5 | not published | foot length 27.5 cm | UK 8.5 · EU 42.5 · CM / JP 27.5 |
| 12 | foot length 28 cm | 11 | 12 | foot length 28 cm | UK 9 · EU 43 · CM / JP 28 |
| 12.5 | foot length 28.4 cm | 11 or 12 | not published | foot length 28 cm | UK 9 · EU 43 · CM / JP 28 |
| 13 | foot length 28.8 cm | 12 | not published | foot length 29 cm | UK 10 · EU 44 · CM / JP 29 |
What wearers say
Charts describe a garment. People who own both brands describe a fit, and their answer ranks above this table once five of them stand behind it. Pick your size in the converter to see whether there are enough yet.
Sources
- adidas size guide, read on 2026-09-17. adidas on TrueToSize
- On size guide, read on 2026-09-17. On on TrueToSize