Kids' shoe sizes: US, UK, EU and cm
Children's sizes are the most confusing of all: the US scale counts up to 13.5 for small children (marked C), then starts again at 1 for older children (marked Y), so a 1Y is bigger than a 13C. The UK scale restarts too, one step later: UK 13.5 is followed by UK 1. EU sizes simply continue the adult scale downwards, which makes them the easiest to follow as a child grows. Nike labels 2C for about 6 months, 4C for 12 months and 7C for 36 months; beyond that, age says little and only the foot length counts.
| US | UK | EU | Foot length (cm) |
|---|---|---|---|
| 2C | 1.5 | 17 | 10 |
| 3C | 2.5 | 18.5 | 10.8 |
| 4C | 3.5 | 19.5 | 11.6 |
| 5C | 4.5 | 21 | 12.5 |
| 6C | 5.5 | 22 | 13.3 |
| 7C | 6.5 | 23.5 | 14.1 |
| 8C | 7.5 | 25 | 15.1 |
| 9C | 8.5 | 26 | 15.9 |
| 10C | 9.5 | 27 | 16.7 |
| 10.5C | 10 | 27.5 | 17.1 |
| 11C | 10.5 | 28 | 17.6 |
| 11.5C | 11 | 28.5 | 17.9 |
| 12C | 11.5 | 29.5 | 18.4 |
| 12.5C | 12 | 30 | 18.9 |
| 13C | 12.5 | 31 | 19.2 |
| 13.5C | 13 | 31.5 | 19.7 |
| 1Y | 13.5 | 32 | 20.2 |
| 1.5Y | 1 | 33 | 20.5 |
| 2Y | 1.5 | 33.5 | 21 |
| 2.5Y | 2 | 34 | 21.4 |
| 3Y | 2.5 | 35 | 21.7 |
| 3.5Y | 3 | 35.5 | 22.2 |
| 4Y | 3.5 | 36 | 22.4 |
| 4.5Y | 4 | 36.5 | 22.7 |
| 5Y | 4.5 | 37.5 | 23.2 |
| 5.5Y | 5 | 38 | 23.5 |
| 6Y | 5.5 | 38.5 | 23.8 |
| 6.5Y | 6 | 39 | 24.3 |
| 7Y | 6 | 40 | 24.6 |
How to measure
Measure the child standing, heel against a wall, from the wall to the tip of the longest toe. Leave about 1 cm of growing room, a thumb’s width at the toe of the fitted shoe, and re-measure every few months: small feet grow fast.
The table is a conversion between labels, not a measurement standard: brands differ by up to a full size. When a garment or shoe matters, use the centimeter column and the brand’s own chart. Centimeters to inches, if needed: cm to inches.
Sources
All three Nike kids’ charts (baby and toddler, little kids, big kids) are merged here; they agree where they overlap (1Y to 3Y). Nike gives foot length in inches; the centimeter column is that figure × 2.54. Nike’s chart labels both 6.5Y and 7Y as UK 6; we keep it as published.
Checked against the sources on 30 October 2026. Found a difference with a current chart? The methodology page keeps the corrections log.
Other size charts
Frequently asked questions
13.5C, then 1Y: the scale restarts. At Nike, 13C fits a foot of about 19.2 cm and 1Y about 20.2 cm.
US 12.5C (UK 12) at Nike, for a foot of about 18.9 cm.
About 1 cm, roughly a thumb’s width, between the longest toe and the end of the shoe. Much more and the child can trip.