👟 Brand to Brand
On to Fila Shoe Size Conversion
Switching from On to Fila? On runs true to size and Fila runs small, so the size you order changes. Here's the full chart.
A On 9 works out to a Fila 9.5 — about half a size up. The chart below has every size.
On → Fila: size up half a size
A On 9 is a Fila 9.5.
Find your On size on the left, read across for Fila:
| On size | Fila size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6.5 | 7 | 5.5 | 37 | 23.5 |
| 7 | 7.5 | 6 | 38 | 24.3 |
| 7.5 | 8 | 6.5 | 38.5 | 24.7 |
| 8 | 8.5 | 7 | 39.5 | 25.1 |
| 8.5 | 9 | 7.5 | 41 | 25.9 |
| 9 | 9.5 | 8 | 41.5 | 26.3 |
| 9.5 | 10 | 8.5 | 42.5 | 26.7 |
| 10 | 10.5 | 9 | 43 | 27.1 |
| 10.5 | 11 | 9.5 | 43.5 | 27.5 |
| 11 | 11.5 | 10 | 44 | 27.9 |
| 11.5 | 12 | 10.5 | 44.5 | 28.3 |
| 12 | 12.5 | 11 | 45.5 | 28.7 |
| 12.5 | 13 | 11.5 | 46 | 29.1 |
| 13 | 13.5 | 12 | 47 | 29.5 |
| 13.5 | 14 | 12.5 | 47.5 | 29.9 |
| 14 | 14.5 | 13 | 48 | 30.3 |
| 14.5 | 15 | 13.5 | 49 | 31.1 |
| 15 | 15.5 | 14 | 49.5 | 31.5 |
⚠️ Fit varies by model. On (On Running) runs true to size for most, with a snug, performance fit. Fila tends to run about half a size small for many lifestyle models.
Fila to On → · On chart · Fila chart · Brand finder
What is a On 9 in Fila?
A On 9 is about a Fila 9.5 — they share a foot length of roughly 26.3 cm (UK 8, EU 41.5).
Do On and Fila fit the same?
No — On runs true to size and Fila runs small, so size up half a size when you switch.
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