Brooks Hyperion Elite 4 Sizing Guide: Does It Run Small or True to Size?

Fit Notes

Nike Vaporfly 3

Both models run identically in terms of pure longitudinal length. However, the standard Brooks model provides substantially more vertical volume and toe box width compared to the low-volume, narrow Nike forefoot. If you typically size up in the Vaporfly 3 solely to accommodate your foot width, you should apply the compensation factor and return to your true size (US 10.0 / EU 44) for the standard Brooks to avoid an excessively long fit.

Saucony Endorphin Pro 4

The shoes match perfectly in overall length and midfoot wrap characteristics. The primary structural distinction lies in the toe box geometry: the standard Brooks features a straighter big-toe line that promotes superior natural toe splay, whereas the Saucony relies on a more aggressively curved rocker profile that pushes the toes together.

Adidas Adios Pro 4

The Adidas Adios Pro 4 features a highly tapered and shallow toe box, frequently forcing runners to size up a half size (e.g., to a US 10.0) to prevent bruised toenails. Because the Brooks is cut true to size with an exceptionally roomy forefoot, you do not need to size up for width compensation; you can safely return to your true standard size of US 9.5 (EU 43) to achieve a proper, secure performance fit.

Nike Alphafly 3

Both shoes share a similar lengthwise fit, but they diverge massively in midfoot and upper entry mechanics. The Nike Alphafly 3 is known for a tight, low-volume entry and a narrow, aggressive arch curve, while the Brooks Hyperion Elite 4 provides an accommodating step-in, a higher toe box ceiling, and a more neutral arch profile.