US to UK Kids' Shoe Size Conversion
| US | UK |
|---|---|
| 4 | 3.5 |
| 5 | 4.5 |
| 6 | 5.5 |
| 7 | 6 |
| 8 | 7 |
| 9 | 8 |
| 10 | 9 |
| 11 | 10 |
| 12 | 11 |
| 13 | 12 |
| 1Y | 13 |
| 2Y | 1 |
| 3Y | 2 |
Sizing conventions vary by brand and by cut — this table shows the standard published conversion. Always check the garment's own size chart when one is available. See how these tables are compiled.
Kids' shoe sizing runs on the same US/UK offset pattern as adult shoes through most of the range — a US 10 toddler shoe is a UK 9 — before the scale switches to youth 'Y' sizing around a US 1Y, where the UK number keeps climbing on its own numeral track.
That switchover point is the detail that trips up US shoppers ordering from UK children's retailers: below it, subtract roughly one whole size going US to UK; above it, the two scales diverge enough that the published table, not mental arithmetic, is the reliable reference.
Frequently asked questions
Does the US-to-UK kids' shoe offset stay the same across all sizes?
No — it holds fairly steady through the toddler range but shifts once youth 'Y' sizing starts, roughly at a US 1Y. Check the table directly near that boundary rather than assuming a fixed one-size gap.