Brooks Ghost 15 vs Nike React Infinity Run 4 Sizing
Brooks Ghost 15 vs Nike React Infinity Run 4: side-by-side fit, toe-box width and the exact size to order in each — they fit the same length. Free interactive sizing comparison.
Do the Brooks Ghost 15 and Nike React Infinity Run 4 take the same size?
Yes — keep your usual size. A US 10 in the Ghost 15 is about a US 10 in the React Infinity Run 4.
How they compare
Brooks Ghost 15 → Nike React Infinity Run 4: The Brooks Ghost 15 runs true to size, similar in width to the Nike React Infinity Run 4. Your US 10 in the Ghost 15 translates to the same size in the React Infinity Run 4.
Nike React Infinity Run 4 → Brooks Ghost 15: The Nike React Infinity Run 4 runs true to size, similar in width to the Brooks Ghost 15. Your US 10 in the React Infinity Run 4 translates to the same size in the Ghost 15.
Spec comparison
| Spec | Brooks Ghost 15 | Nike React Infinity Run 4 |
|---|---|---|
| Length Fit | True to Size | True to Size |
| Toe Box Profile | Wide | Wide |
| Arch Support | High | High |
| Upper Material | Mesh | Flyknit |
Size conversion: Brooks Ghost 15 → Nike React Infinity Run 4
If you wear these US sizes in the Ghost 15, here is the size to order in the React Infinity Run 4.
| Your US size in Ghost 15 | Recommended React Infinity Run 4 size |
|---|---|
| US 8 | US 8 |
| US 9 | US 9 |
| US 10 | US 10 |
| US 11 | US 11 |
| US 12 | US 12 |
Frequently asked questions
Which runs bigger, the Brooks Ghost 15 or the Nike React Infinity Run 4?
The Brooks Ghost 15 and Nike React Infinity Run 4 fit the same in length — both are true to size — so you can keep your usual size moving between them.
If I wear a US 10 in the Ghost 15, what size is the React Infinity Run 4?
Target a US 10 in the React Infinity Run 4. A US 9 in the Ghost 15 maps to about US 9, and a US 11 to about US 11.
Is the Ghost 15 wider than the React Infinity Run 4?
The Brooks Ghost 15 has a similar toe box width versus the Nike React Infinity Run 4 (wide vs wide). Forefoot room is one of the biggest reasons two shoes at the same length still feel different.
How do the Ghost 15 and React Infinity Run 4 compare on support and material?
The Ghost 15 pairs high arch support with a mesh upper; the React Infinity Run 4 has high support and a flyknit upper.
Try it: adjust the size and compare live
Verdict
The Brooks Ghost 15 runs true to size, similar in width to the Nike React Infinity Run 4. Your US 10 in the Ghost 15 translates to the same size in the React Infinity Run 4.
| Spec | Brooks Ghost 15 | Nike React Infinity Run 4 |
|---|---|---|
| Length Fit | True to Size | True to Size |
| Toe Box Profile | Wide | Wide |
| Arch Support | High | High |
| Upper Material | Mesh | Flyknit |