Nike Pegasus 41
Sizing & fit guide
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Why the Nike Pegasus 41 fits this way
The Nike Pegasus line is the long-running benchmark daily trainer, and the Pegasus 41 continues its reputation for true-to-size fit. Runners routinely use it as the reference point when comparing other shoes — "I wear an 11 Pegasus" appears as a baseline against which Saucony, adidas, and Asics models get sized — which only works because the Peg is dependably TTS. For most runners, your standard running size carries straight over.
The recurring caveat is width, not length. The standard Pegasus runs medium and can feel snug for wider feet; the common running-community advice is "avoid standard-width Nike if you have wide feet" and instead buy the dedicated Wide (2E) or Extra-Wide (4E) Pegasus, which Nike offers. Sizing up in the standard width adds length without fixing width and leaves the shoe sloppy, so width-constrained runners should change width, not size.
Net: true to size in your normal running size. Confidence is low here because direct Pegasus 41 sizing posts are sparse in the harvest (the threads skew toward cross-brand comparisons), so this leans on the Peg's well-established TTS reputation — a reliable default for a daily trainer.
Common scenarios
I wear US 10 in my current daily trainer. What size Pegasus 41?
US 10 — the Pegasus 41 fits true to size and is a reliable benchmark. Keep your normal running size.
I have wide feet. Should I size up in the Pegasus?
No — buy the dedicated Wide (2E) or Extra-Wide (4E) Pegasus instead. Sizing up the standard width adds length, not width, and makes the shoe sloppy.
Should I leave a thumb's width at the toe for running?
Yes — for running, a thumb's width of toe room is normal and the TTS Pegasus provides it. That's a running-fit norm, not a reason to size up beyond TTS.
How it compares to other models
- Nike Invincible 3 Low confidence
The Invincible 3 runs longer than the Pegasus — runners who are TTS in the Peg often go ½ down in the Invincible
- Nike Vaporfly 4 Low confidence
Both true to size; the Vaporfly has a lower-volume racing forefoot than the daily-trainer Peg
- r/RunningShoeGeeks — Pegasus used as TTS sizing anchor (cross-brand thread)
- r/RunningShoeGeeks — wide-foot Nike advice (use Wide version)
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