Width options: standard (Men's) / standard (Women's)
Imported family signal
15 of 15 runners said this shoe fit true to size.
| If you wear | Length | Width | Toebox | Reports |
|---|---|---|---|---|
Adidas Adizero Boston 12 (Women's) 9100% 1 of 1 runners landed on 9 (0.5 weighted). | True to size | True to width | Good room | Early reportsEarly Based on 1 reportUS 9-9 |
Altra Escalante 4 (Men's) EU 42 / UK 7.5100% 1 of 1 runners landed on EU 42 / UK 7.5 (0.5 weighted). | True to size | Slightly narrow | Roomy toebox | Early reportsEarly Based on 1 reportUS 427.5-427.5 |
Asics Gel-Kayano 31 (Women's) 8.5100% 1 of 1 runners landed on 8.5 (0.5 weighted). | True to size | Very narrow | Good room | Early reportsEarly Based on 1 reportUS 8.5-8.5 |
Asics Novablast 5 (Women's) 9100% 1 of 1 runners landed on 9 (0.5 weighted). | True to size | Slightly narrow | Good room | Early reportsEarly Based on 1 reportUS 9-9 |
Asics Superblast 2 (Women's) 8.5100% 1 of 1 runners landed on 8.5 (0.5 weighted). | True to size | Very narrow | Good room | Early reportsEarly Based on 1 reportUS 8.5-8.5 |
Brooks Adrenaline GTS 24 (Women's) 6100% 1 of 1 runners landed on 6 (0.5 weighted). | True to size | True to width | Roomy toebox | Early reportsEarly Based on 1 reportUS 6-6 |
Hoka Clifton 10 (Women's) 11.5100% 1 of 1 runners landed on 11.5 (0.5 weighted). | True to size | True to width | Good room | Early reportsEarly Based on 1 reportUS 11.5-11.5 |
Nike Alphafly 3 (Men's) W11100% 1 of 1 runners landed on W11 (0.5 weighted). | True to size | True to width | Good room | Early reportsEarly Based on 1 reportUS 11-11 |
Nike Pegasus 40 (Men's) 11100% 1 of 1 runners landed on 11 (0.5 weighted). | True to size | True to width | Good room | Early reportsEarly Based on 1 reportUS 11-11 |
Nike Pegasus 42 (Men's) US 11100% 1 of 1 runners landed on US 11 (0.5 weighted). | True to size | Slightly narrow | Good room | Early reportsEarly Based on 1 reportUS 11-11 |
Nike Vaporfly 3 (Men's) 11100% 1 of 1 runners landed on 11 (0.5 weighted). | True to size | True to width | Good room | Early reportsEarly Based on 1 reportUS 11-11 |
Puma Velocity Nitro 2 (Women's) UK 9100% 1 of 1 runners landed on UK 9 (0.5 weighted). | True to size | Slightly narrow | Snug toebox | Early reportsEarly Based on 1 reportUS 9-9 |
Saucony Endorphin Pro 2 (Men's) 12100% 1 of 1 runners landed on 12 (0.5 weighted). | True to size | True to width | Good room | Early reportsEarly Based on 1 reportUS 12-12 |
Nike Vaporfly 3 (Women's) 1150%1450% 1 of 2 runners landed on 11 (0.9 weighted). | True to size | True to width | Good room | Early reportsEarly Based on 2 reportsUS 11-14 |
1 of 1 runners landed on 9 (0.5 weighted).
1 of 1 runners landed on EU 42 / UK 7.5 (0.5 weighted).
1 of 1 runners landed on 8.5 (0.5 weighted).
1 of 1 runners landed on 9 (0.5 weighted).
1 of 1 runners landed on 8.5 (0.5 weighted).
1 of 1 runners landed on 6 (0.5 weighted).
1 of 1 runners landed on 11.5 (0.5 weighted).
1 of 1 runners landed on W11 (0.5 weighted).
1 of 1 runners landed on 11 (0.5 weighted).
1 of 1 runners landed on US 11 (0.5 weighted).
1 of 1 runners landed on 11 (0.5 weighted).
1 of 1 runners landed on UK 9 (0.5 weighted).
1 of 1 runners landed on 12 (0.5 weighted).
1 of 2 runners landed on 11 (0.9 weighted).
Your size, to start
Start with your usual size unless strong runner evidence says otherwise. We don't yet have enough validated reports to confidently recommend a length-size change for the Nike Alphafly 3 (Men's).
Own the Nike Alphafly 3 (Men's)? A 20-second fit report helps other runners.
Add my fit reportAcross the full report set, this many called the shoe true to size.
Reports linked to a public source you can open and verify.
Signals for hotspots, blisters, or other pain points across the full report set.
Runner notes are AI-extracted sizing summaries from public running-shoe discussions. They are not quotes.
| Came from | Bought | Verdict | Runner note | Issues | When |
|---|---|---|---|---|---|
Saucony Endorphin Pro 2 (Men's) Size 12 | 12 | True to sizeTrue to width | Reported fit vs Saucony Endorphin Pro 2 (Men's) — true to length, true to width. | No issues | Mar 2026 |
Nike Alphafly 3 (Men's) Size M9.5 | W11 | True to sizeTrue to width | Reported fit vs Nike Alphafly 3 (Men's) — true to length, true to width. | No issues | Mar 2026 |
Nike Vaporfly 3 (Women's) Size 14 | 14 | True to sizeTrue to width | Reported fit vs Nike Vaporfly 3 (Women's) — true to length, true to width. | No issues | Mar 2026 |
Puma Velocity Nitro 2 (Women's) Size UK 9 | UK 9 | True to sizeSlightly narrow | Reported fit vs Puma Velocity Nitro 2 (Women's) — true to length, slightly narrow, snug toebox. | No issues | Mar 2026 |
Nike Vaporfly 3 (Women's) Size 11 | 11 | True to sizeTrue to width | Reported fit vs Nike Vaporfly 3 (Women's) — true to length, true to width. | Blisters (heel) | Mar 2026 |
Asics Novablast 5 (Women's) Size 8.5 | 9 | True to sizeSlightly narrow | Reported fit vs Asics Novablast 5 (Women's) — true to length, slightly narrow. | No issues | Mar 2026 |
Brooks Adrenaline GTS 24 (Women's) Size 6 | 6 | True to sizeTrue to width | Reported fit vs Brooks Adrenaline GTS 24 (Women's) — true to length, true to width, roomy toebox. | No issues | Mar 2026 |
Adidas Adizero Boston 12 (Women's) Size 8.5 | 9 | True to sizeTrue to width | Reported fit vs Adidas Adizero Boston 12 (Women's) — true to length, true to width. | No issues | Mar 2026 |
Hoka Clifton 10 (Women's) Size 11.5 | 11.5 | True to sizeTrue to width | Reported fit vs Hoka Clifton 10 (Women's) — true to length, true to width. | No issues | Mar 2026 |
Altra Escalante 4 (Men's) Size EU 42 / UK 7.5 | EU 42 / UK 7.5 | True to sizeSlightly narrow | Reported fit vs Altra Escalante 4 (Men's) — true to length, slightly narrow, roomy toebox. | Black toenails | Mar 2026 |
Reported fit vs Saucony Endorphin Pro 2 (Men's) — true to length, true to width.
Reported fit vs Nike Alphafly 3 (Men's) — true to length, true to width.
Reported fit vs Nike Vaporfly 3 (Women's) — true to length, true to width.
Reported fit vs Puma Velocity Nitro 2 (Women's) — true to length, slightly narrow, snug toebox.
Reported fit vs Nike Vaporfly 3 (Women's) — true to length, true to width.
Reported fit vs Asics Novablast 5 (Women's) — true to length, slightly narrow.
Reported fit vs Brooks Adrenaline GTS 24 (Women's) — true to length, true to width, roomy toebox.
Reported fit vs Adidas Adizero Boston 12 (Women's) — true to length, true to width.
Reported fit vs Hoka Clifton 10 (Women's) — true to length, true to width.
Reported fit vs Altra Escalante 4 (Men's) — true to length, slightly narrow, roomy toebox.
See how the Nike Alphafly (Men's) fits side-by-side with shoes runners know well.
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