Kids' Shoe Size Guide
US kids' shoe sizing is split into three tiers that each restart their numbering: Toddler/Infant (US 0C–10C, roughly ages 0–4), Little Kids (US 10.5C–13.5C, roughly ages 4–7), and Big Kids (US 1Y–7Y, roughly ages 5–12). The "C" stands for "child" and the "Y" for "youth".
The youth scale rejoins the adult scale at the top: a Big Kids US 7Y is essentially the same length as a Men's US 7 - the crossover point where many growing teens move into adult sizing.
Convert a kids' shoe size
Pre-set to Big Kids US 3Y. Switch the tier from the gender tabs, or change the input system, to convert any kids' size.
| System | US / CA | UK | EU | AU | JP (cm) | KR (mm) | CN | MX | Foot (cm) | Foot (in) |
|---|---|---|---|---|---|---|---|---|---|---|
| Your size | N/A |
Sizes are approximate and may vary by brand. Check the manufacturer's size chart before buying.
Toddler / Infant shoe size chart (US 2C–10C)
| US | UK | EU | JP (cm) | Foot (cm) |
|---|---|---|---|---|
| 2 | 1.5 | 17 | 8.5 | 8.3 |
| 2.5 | 2 | 18 | 9.0 | 9.0 |
| 3 | 2.5 | 18-19 | 9.5 | 9.5 |
| 3.5 | 3 | 19 | 10.0 | 10.0 |
| 4 | 3.5 | 19-20 | 10.5 | 10.5 |
| 4.5 | 4 | 20 | 11.0 | 11.0 |
| 5 | 4.5 | 20-21 | 11.5 | 11.5 |
| 5.5 | 5 | 21 | 12.0 | 12.0 |
| 6 | 5.5 | 22 | 12.5 | 12.5 |
| 6.5 | 6 | 22-23 | 13.0 | 13.0 |
| 7 | 6.5 | 23 | 13.5 | 13.5 |
| 7.5 | 7 | 23-24 | 14.0 | 14.0 |
| 8 | 7.5 | 24 | 14.5 | 14.6 |
| 8.5 | 8 | 25 | 15.0 | 15.0 |
| 9 | 8.5 | 25-26 | 15.5 | 15.5 |
| 9.5 | 9 | 26 | 16.0 | 16.0 |
| 10 | 9.5 | 27 | 16.0 | 16.3 |
Little Kids shoe size chart (US 10.5C–13.5C)
| US | UK | EU | JP (cm) | Foot (cm) |
|---|---|---|---|---|
| 10.5 | 9.5 | 27-28 | 16.5 | 16.5 |
| 11 | 10 | 28 | 17.0 | 17.0 |
| 11.5 | 10.5 | 28-29 | 17.5 | 17.5 |
| 12 | 11 | 29-30 | 18.0 | 18.0 |
| 12.5 | 11.5 | 30 | 18.5 | 18.4 |
| 13 | 12 | 31 | 19.0 | 19.0 |
| 13.5 | 12.5 | 31-32 | 19.5 | 19.5 |
Big Kids shoe size chart (US 1Y–7Y)
| US | UK | EU | JP (cm) | Foot (cm) |
|---|---|---|---|---|
| 1 | 13 | 32 | 19.5 | 19.7 |
| 1.5 | 13.5 | 32-33 | 20.0 | 20.0 |
| 2 | 1 | 33 | 20.5 | 20.3 |
| 2.5 | 1.5 | 33-34 | 21.0 | 20.6 |
| 3 | 2 | 34 | 21.0 | 21.0 |
| 3.5 | 2.5 | 34-35 | 21.5 | 21.3 |
| 4 | 3 | 35-36 | 22.0 | 21.6 |
| 4.5 | 3.5 | 36 | 22.5 | 21.9 |
| 5 | 4 | 36-37 | 23.0 | 22.2 |
| 5.5 | 4.5 | 37 | 23.5 | 22.5 |
| 6 | 5 | 38 | 23.5 | 22.9 |
| 6.5 | 5.5 | 38-39 | 24.0 | 23.2 |
| 7 | 6 | 39-40 | 24.5 | 23.5 |
Frequently asked questions
How often should I check my child's shoe size?
For children under six, measure feet every three to four months - they can grow up to half a size in that window. From age six onwards, every six months is usually enough. Always measure both feet at the end of the day when they are at their largest, and size up to the longer foot.
What's the difference between Big Kids and Adult shoe sizes?
Big Kids US 7Y is roughly equivalent to Men's US 7 - they share a similar last length. The differences are in fit and construction: kids' lines use wider toe-boxes, softer flexible soles, and lighter cushioning suited to a still-developing foot. Many teens and small-footed adults intentionally buy Big Kids sizes for the lower price.
Are kids' shoe sizes the same internationally?
Only partially. The US uses three separate kids' scales (Toddler/Infant 'C', Little Kids 'C', and Big Kids 'Y') with restarting numbers at each tier. The UK uses a single kids' scale that runs 0-13.5 before resetting at adult 1. The EU is the simplest: it uses one continuous Paris-point scale for kids and adults, so EU 32 means the same length regardless of age.
Sizes are approximate and may vary by brand. Check the manufacturer's size chart before buying.