👟 On
On Men's Size 10.5
A On men's size 10.5 fits like a standard US 10.5. Here's that in UK, EU and foot length, and what to order if you measure differently.
On runs true to size, so a men's On 10.5 is a standard US 10.5 (UK 9.5, EU 43.5, about 27.5 cm of foot). Order your usual size.
On 10.5 = US 10.5
UK 9.5 · EU 43.5 · foot ≈ 27.5 cm
What to order: your usual US size — a US 10.5 wearer takes a On 10.5.
| On size | Fits like (US) | UK | EU | Foot cm |
|---|---|---|---|---|
| 9.5 | 9.5 | 8.5 | 42.5 | 26.7 |
| 10.5 | 10.5 | 9.5 | 43.5 | 27.5 |
| 11.5 | 11.5 | 10.5 | 44.5 | 28.3 |
⚠️ On (On Running) runs true to size for most, with a snug, performance fit.
← On 9.5 · On 11.5 → · Women's On 10.5
Full On size chart → · Brand size finder →
What size is a On men's 10.5?
It fits like a standard US 10.5 — UK 9.5, EU 43.5, about 27.5 cm of foot length.
ⓘ Affiliate links below. As an Amazon Associate we earn from qualifying purchases at no extra cost to you.
★ Top pick · Recommended on Amazon
On Shoes
Shop On in your recommended size — check model fit notes too.
View on Amazon →Recommended on Amazon
Foot Measuring Device
Size from your foot length, not the label — the reliable starting point.
View on Amazon →Recommended on Amazon
Gel Insoles
Take up a touch of slack if a size runs slightly large.
View on Amazon →