Saucony Endorphin Elite 2 Sizing Guide: Does It Run Small or True to Size?

Fit Notes

Nike Alphafly 3

The Alphafly 3 features a highly compliant, stretchy Atomknit upper with a wider, anatomically correct forefoot footprint. Sizing up a half size in the Endorphin Elite 2 is necessary to match the Alphafly's forefoot comfort and prevent lateral toe friction caused by the Saucony's shorter length and stiffer toe bumper.

Adidas Adizero Adios Pro 4

The Adios Pro 4 has a narrow fit with a non-stretch Celermesh upper. While some runners size up in the Adidas purely for extra width, the Endorphin Elite 2 requires a half-size increase due to a completely different mechanical constraint: its aggressively tapered lateral toe box and rigid, unyielding toe bumper require more physical length to prevent severe bruising of the outer digits, meaning you cannot rely on midfoot width matching alone.

ASICS Metaspeed Sky Paris

The Metaspeed Sky Paris runs true-to-size with a comfortable, secure forefoot space. Because the Endorphin Elite 2 has a shorter longitudinal length and a lower vertical toe box ceiling, a half-size increase is required to allow for adequate digit splay and prevent your toes from impacting the front chamber.

Saucony Endorphin Pro 4

The Endorphin Pro 4 utilizes a roomier, more traditional training last that fits reliably true-to-size. Runners transitioning to the performance-dialed, tightly tapered racing last of the Endorphin Elite 2 must scale up a half size to maintain comparable toe comfort and prevent the outer toes from pressing against the lateral edge.

Nike Alphafly Next% (v1)

The original Alphafly features an incredibly narrow arch that often caused severe blistering, prompting many to size up for width relief. In contrast, the Endorphin Elite 2 offers a more accommodating, wider midfoot arch but suffers from a significantly shorter forefoot length. Therefore, a half-size increase is required strictly for longitudinal toe protection rather than midfoot width adjustment.