RunSized

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

Based on community reports from 11 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 Echo 3True to sizeCompare sizes
On Cloudeclipse 2True to sizeCompare sizes
On Cloudsurfer NextTrue to sizeCompare sizes
On Cloudflow 4True to sizeCompare sizes
On Cloud X 4No data yetCompare sizes
On Cloudboom Echo 2No data yetCompare sizes
On Cloudflow 2No data yetCompare sizes
On Cloudflow 3No data yetCompare sizes
On Cloudmonster 1No data yetCompare sizes
On Cloudmonster 2No data yetCompare sizes
On Cloudrunner 1No data yetCompare sizes
On Cloudrunner 2No data yetCompare sizes
On Cloudstratus 3No data yetCompare sizes
On Cloudstratus 4No data yetCompare sizes
On Cloudultra 1No data yetCompare sizes
On Cloudultra 2No 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 4 models with reports, 4 run true to size, 0 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 11 On-related reports, the data gives you a solid starting point.

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