RunSized

On Shoe Sizing Guide — Do On Shoes Run True to Size?

Based on community reports from 4 runners, here's what you need to know about On sizing. We have data on 16 On shoe models.

On Shoes Sizing Data

ShoeSizingCompare
On Cloudboom EchoSlightly longCompare sizes
On CloudflowTrue to sizeCompare sizes
On Cloudsurfer NextTrue to sizeCompare sizes
On Cloud XNo data yetCompare sizes
On Cloudboom EchoNo data yetCompare sizes
On CloudeclipseNo data yetCompare sizes
On CloudflowNo data yetCompare sizes
On CloudflowNo data yetCompare sizes
On CloudmonsterNo data yetCompare sizes
On CloudmonsterNo data yetCompare sizes
On CloudrunnerNo data yetCompare sizes
On CloudrunnerNo data yetCompare sizes
On CloudstratusNo data yetCompare sizes
On CloudstratusNo data yetCompare sizes
On CloudultraNo data yetCompare sizes
On CloudultraNo data yetCompare sizes

On Sizing FAQ

Do On shoes run true to size?

Most On shoes run true to size based on community data. Of the 3 models with reports, 2 run true to size, 1 run long, and 0 run short.

Should I size up in On?

On Cloudmonster runs large — most runners size down 0.5. Cloudsurfer runs true to size but has a snug toebox. Check individual model pages for guidance.

How accurate is this On sizing data?

All sizing data on RunSized is sourced from real runners who've worn both a reference shoe and a On shoe. We show confidence tiers — more reports means more reliable data. With 4 On-related reports, the data gives you a solid starting point.

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