Does the ASICS Gel-Nimbus 25 Run Big or Small?
The ASICS Gel-Nimbus 25 (Running) runs true to size with a wide toe box. See the US/UK/EU/CM conversion chart and what size to order.
How the Gel-Nimbus 25 fits
The ASICS Gel-Nimbus 25 (Running) runs true to size. Compared with a true-to-size sneaker, order your usual size. It has a wide toe box and high arch support, with a engineered mesh upper that shapes how the fit settles over time.
Gel-Nimbus 25 fit specs
| Category | Running |
| Length Fit | True to Size |
| Toe Box Profile | Wide |
| Arch Support | High |
| Upper Material | Engineered Mesh |
Size conversion chart
US, UK, EU and centimetre equivalents. Use it alongside the fit note above to land the right size in the Gel-Nimbus 25.
| US | UK | EU | CM |
|---|---|---|---|
| 4 | 3 | 36 | 22 |
| 4.5 | 3.5 | 36.5 | 22.5 |
| 5 | 4 | 37 | 23 |
| 5.5 | 4.5 | 37.5 | 23.5 |
| 6 | 5 | 38 | 24 |
| 6.5 | 5.5 | 38.5 | 24.5 |
| 7 | 6 | 39 | 25 |
| 7.5 | 6.5 | 40 | 25.5 |
| 8 | 7 | 41 | 26 |
| 8.5 | 7.5 | 41.5 | 26.5 |
| 9 | 8 | 42 | 27 |
| 9.5 | 8.5 | 42.5 | 27.5 |
| 10 | 9 | 43 | 28 |
| 10.5 | 9.5 | 44 | 28.5 |
| 11 | 10 | 44.5 | 29 |
| 11.5 | 10.5 | 45 | 29.5 |
| 12 | 11 | 46 | 30 |
| 12.5 | 11.5 | 46.5 | 30.5 |
| 13 | 12 | 47 | 31 |
| 13.5 | 12.5 | 47.5 | 31.5 |
| 14 | 13 | 48 | 32 |
| 14.5 | 13.5 | 48.5 | 32.5 |
| 15 | 14 | 49 | 33 |
Frequently asked questions
Does the ASICS Gel-Nimbus 25 run big or small?
The ASICS Gel-Nimbus 25 runs true to size. Compared with a true-to-size sneaker, order your usual size.
What size should I get in the ASICS Gel-Nimbus 25?
If you normally wear a US 10, target a US 10 in the Gel-Nimbus 25. A US 9 foot maps to about US 9 and a US 11 to about US 11, because the model runs true to size.
Is the ASICS Gel-Nimbus 25 wide or narrow?
It has a wide toe box with extra room across the forefoot. Upper material is engineered mesh, which affects how much it gives over time.
What kind of arch support does the ASICS Gel-Nimbus 25 have?
Arch support is rated high on the Gel-Nimbus 25 (Running). Expect a structured, cushioned ride.
Compare the Gel-Nimbus 25 to another shoe
Select both shoes to see your sizing verdict
| Spec | ASICS Gel-Nimbus 25 | Shoe B |
|---|---|---|
| Length Fit | True to Size | — |
| Toe Box Profile | Wide | — |
| Arch Support | High | — |
| Upper Material | Engineered Mesh | — |