UK to US Kids Shoe Size Chart
Convert UK children's shoe sizes to US instantly. Complete chart from newborn to junior, with the simple conversion rule, foot length in cm and age guide.
UK to US kids shoe size — the simple rule
Converting UK children's shoe sizes to US is straightforward: add 1 to the UK size to get the US equivalent. UK 5 = US 6, UK 10 = US 11, UK 13 = US 1 Youth. This rule applies consistently from infant sizes through to junior.
Full UK to US kids shoe size chart
Use this complete chart to convert any UK children's shoe size to US, with foot length in cm and approximate age for reference. Always measure your child's foot rather than relying on age alone.
| UK Kids | US Kids | EU | Foot (cm) | Approx. age |
|---|---|---|---|---|
| UK 0 | US 1 | 15–16 | 9–10 | Newborn–3m |
| UK 1 | US 2 | 17 | 10.5 | 3–6 months |
| UK 2 | US 3 | 18–19 | 11.5 | 6–9 months |
| UK 3 | US 4 | 19–20 | 12.5 | 9–12 months |
| UK 4 | US 5 | 20–21 | 13.5 | 12–18 months |
| UK 5 | US 6 | 22 | 14.5 | 18–24 months |
| UK 6 | US 7 | 23 | 15.5 | 2–3 yrs |
| UK 7 | US 8 | 24–25 | 16.5 | 3–4 yrs |
| UK 8 | US 9 | 26 | 17 | 4–5 yrs |
| UK 9 | US 10 | 27 | 18 | 5–6 yrs |
| UK 10 | US 11 | 28–29 | 19 | 6–7 yrs |
| UK 11 | US 12 | 29–30 | 20 | 7–8 yrs |
| UK 12 | US 13 | 30–31 | 20.5 | 8–9 yrs |
| UK 13 | US 1Y | 31–32 | 21 | 9–10 yrs |
| UK 1J | US 2Y | 33 | 22 | 10–11 yrs |
| UK 2J | US 3Y | 34–35 | 22.5 | 11–12 yrs |
| UK 3J | US 4Y | 35–36 | 23 | 12+ yrs |
Does the UK to US conversion change for junior sizes?
Yes — slightly. For children's sizes (UK 0–13), the rule is simply +1. When your child moves into junior/youth sizes, UK 1J = US 2Y, UK 2J = US 3Y, and so on. The same +1 logic applies, but US youth sizes are written with a Y suffix rather than a number alone.
Nike, Adidas and most US brands label youth sizes as 1Y, 2Y, 3Y, 4Y, 5Y, 6Y and 7Y. A UK 3 junior equals a US 4Y. Once your child reaches around UK 5–6 junior, they may fit adult sizes — at which point the conversion becomes UK = US for men, and UK + 2 for women.
UK to US kids shoe size — common conversions
| UK size | US size | Who typically wears it |
|---|---|---|
| UK 5 | US 6 | Toddler, 18–24 months |
| UK 8 | US 9 | Child, age 4–5 |
| UK 10 | US 11 | Child, age 6–7 |
| UK 12 | US 13 | Child, age 8–9 |
| UK 13 | US 1Y | Child, age 9–10 (moves to youth) |
| UK 2J | US 3Y | Child, age 11–12 |
| UK 3J | US 4Y | Child, age 12+ |
Frequently asked questions
What is UK 8 in US kids shoe size?
UK 8 children's = US 9. Use the formula: UK + 1 = US. This applies to all children's sizes from infant through junior.
What is UK 10 in US kids shoe size?
UK 10 children's = US 11. A UK 10 is typically worn by children around age 6–7 with a foot length of about 19cm.
What is UK 13 in US kids shoe size?
UK 13 = US 1 Youth (1Y). This is the transition point where children move from kids into youth/junior sizing, typically around age 9–10.
Do Nike US kids sizes follow the same conversion?
Yes. Nike follows the standard US kids sizing system, so UK + 1 = Nike US size. Nike labels youth sizes as 1Y, 2Y, 3Y etc., which corresponds to UK 13, 1J, 2J.