👟 Brand to Brand
On to New Balance Shoe Size Conversion
Switching from On to New Balance? On runs true to size and New Balance runs true to size, so the size you order changes. Here's the full chart.
Because On and New Balance share the same fit tendency, your size carries straight across: a On 9 is a New Balance 9.
On and New Balance run the same
Order the same number — a On 9 is a New Balance 9.
Find your On size on the left, read across for New Balance:
| On size | New Balance size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6.5 | 6.5 | 5.5 | 37 | 23.5 |
| 7 | 7 | 6 | 38 | 24.3 |
| 7.5 | 7.5 | 6.5 | 38.5 | 24.7 |
| 8 | 8 | 7 | 39.5 | 25.1 |
| 8.5 | 8.5 | 7.5 | 41 | 25.9 |
| 9 | 9 | 8 | 41.5 | 26.3 |
| 9.5 | 9.5 | 8.5 | 42.5 | 26.7 |
| 10 | 10 | 9 | 43 | 27.1 |
| 10.5 | 10.5 | 9.5 | 43.5 | 27.5 |
| 11 | 11 | 10 | 44 | 27.9 |
| 11.5 | 11.5 | 10.5 | 44.5 | 28.3 |
| 12 | 12 | 11 | 45.5 | 28.7 |
| 12.5 | 12.5 | 11.5 | 46 | 29.1 |
| 13 | 13 | 12 | 47 | 29.5 |
| 13.5 | 13.5 | 12.5 | 47.5 | 29.9 |
| 14 | 14 | 13 | 48 | 30.3 |
| 14.5 | 14.5 | 13.5 | 49 | 31.1 |
| 15 | 15 | 14 | 49.5 | 31.5 |
⚠️ Fit varies by model. On (On Running) runs true to size for most, with a snug, performance fit. New Balance runs true to size and is one of the best brands for width options (2A to 4E).
New Balance to On → · On chart · New Balance chart · Brand finder
What is a On 9 in New Balance?
A On 9 is about a New Balance 9 — they share a foot length of roughly 26.3 cm (UK 8, EU 41.5).
Do On and New Balance fit the same?
Roughly, yes — both run true to size, so the same number fits.
ⓘ Affiliate links below. As an Amazon Associate we earn from qualifying purchases at no extra cost to you.
★ Top pick · Recommended on Amazon
New Balance Shoes
Shop New Balance in your converted size.
View on Amazon →Recommended on Amazon
Foot Measuring Device
Measure once, buy any brand with confidence.
View on Amazon →