UK to US Kids' Shoe Size Conversion
| UK | US |
|---|---|
| 3.5 | 4 |
| 4.5 | 5 |
| 5.5 | 6 |
| 6 | 7 |
| 7 | 8 |
| 8 | 9 |
| 9 | 10 |
| 10 | 11 |
| 11 | 12 |
| 12 | 13 |
| 13 | 1Y |
| 1 | 2Y |
| 2 | 3Y |
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.
Going UK to US for kids' shoes, a UK 9 converts to a US 10 through most of the toddler range, the same offset as the reverse direction but the one shoppers need when a UK-based retailer or hand-me-down shoe only shows the UK number.
Past the UK 12-to-13 boundary the US scale moves into youth 'Y' sizing, and the clean one-size gap seen lower on the chart stops applying — check the published table rather than extending the pattern by hand once a child's foot approaches that size.
Frequently asked questions
Is there a simple rule for UK-to-US kids' shoes?
Roughly add one size going UK to US in the toddler range, but that shortcut breaks down once sizing crosses into youth 'Y' numbering — use the table directly for sizes near that boundary.