Cloudmonster v1
Width options: standard (Men's) / standard (Women's)
Not enough evidence yet
4 of 4 runners said this shoe fit true to size.
Fit Notes
Runs large. Most runners go half size down.
Sizing vs. popular reference shoes
| If you wear | Length | Width | Toebox | Reports |
|---|---|---|---|---|
On Cloudmonster 1 (Women's) 9.5100% 1 of 1 runners landed on 9.5 (0.5 weighted). | True to size | True to width | Good room | Early reportsEarly Based on 1 reportUS 9.5-9.5 |
On Cloudsurfer Next (Women's) 6100% 1 of 1 runners landed on 6 (0.5 weighted). | True to size | Slightly narrow | Good room | Early reportsEarly Based on 1 reportUS 6-6 |
Hoka Bondi 7 (Women's) unknown100% 1 of 1 runners landed on unknown (0.5 weighted). | True to size | Very wide | Very roomy toebox | Early reportsEarly Based on 1 report |
Saucony Guide 17 (Women's) unknown100% 1 of 1 runners landed on unknown (0.5 weighted). | True to size | Very narrow | Good room | Early reportsEarly Based on 1 report |
1 of 1 runners landed on 9.5 (0.5 weighted).
1 of 1 runners landed on 6 (0.5 weighted).
1 of 1 runners landed on unknown (0.5 weighted).
1 of 1 runners landed on unknown (0.5 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 On Cloudmonster 1 (Men's).
Own the On Cloudmonster 1 (Men's)? A 20-second fit report helps other runners.
Add my fit reportCommunity reports
Across 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 |
|---|---|---|---|---|---|
On Cloudmonster 1 (Women's) Size 8 | 9.5 | True to sizeTrue to width | Reported fit vs On Cloudmonster 1 (Women's) — true to length, true to width. | No issues | Mar 2026 |
On Cloudsurfer Next (Women's) Size 6 | 6 | True to sizeSlightly narrow | Reported fit vs On Cloudsurfer Next (Women's) — true to length, slightly narrow. | Ankle rubbing | Mar 2026 |
Hoka Bondi 7 (Women's) Size 6 | unknown | True to sizeToo wide | Reported fit vs Hoka Bondi 7 (Women's) — true to length, too wide, overly roomy toebox. | No issues | Mar 2026 |
Saucony Guide 17 (Women's) Size 8 | unknown | True to sizeToo narrow | Reported fit vs Saucony Guide 17 (Women's) — true to length, too narrow. | No issues | Mar 2026 |
Reported fit vs On Cloudmonster 1 (Women's) — true to length, true to width.
Reported fit vs On Cloudsurfer Next (Women's) — true to length, slightly narrow.
Reported fit vs Hoka Bondi 7 (Women's) — true to length, too wide, overly roomy toebox.
Reported fit vs Saucony Guide 17 (Women's) — true to length, too narrow.
Compare with popular shoes
See how the On Cloudmonster (Men's) fits side-by-side with shoes runners know well.
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