Size 12.5C: the kids’ shoe size explained
A size 12.5C fits a foot of 18.4 to 18.8 cm (7.25 to 7.42 in): UK 12–12.5 and EU 30–30.5 by the standard size tables, a little kid size.
The median child’s foot reaches the middle of a 12.5C at about 7 years and stays in it for about 5 months, in the US Consumer Product Safety Commission’s survey of children.
Where 12.5C sits
After 12.5C: the next sizes
The next size, 13C, fits 4.2 mm more foot, up to 19.3 cm. Around the age a 12.5C is outgrown the median child’s foot grows about 0.8 mm a month, so it fills a 13C about 5 months later.
| Size | Foot (cm) | UK | EU | Outgrown at |
|---|---|---|---|---|
| 12.5C (this size) | 18.4–18.8 | 12–12.5 | 30–30.5 | about 7 years |
| 13C | 18.8–19.3 | 12.5–13 | 30.5–31 | about 7½ years |
| 13.5C | 19.3–19.7 | 13–13.5 | 31–32 | about 8 years |
Outgrown at: when the median child’s foot reaches the top of the size, girls and boys together. Half of children get there sooner.
What 8 brands print for a 12.5C
On the brands’ own charts a 12.5C is for a foot of up to 18.0 cm (Vans) to 18.9 cm (Nike); the standard is 18.8 cm. Check the brand’s chart before you buy.
| Brand | Prints | UK | EU | Foot up to |
|---|---|---|---|---|
| Vans size chart (opens the brand’s site) | 12.5C | 12 | 30 | 18.0 cm |
| adidas size chart (opens the brand’s site) | 12.5k | 12k | 30.5 | 18.3 cm |
| On size chart (opens the brand’s site) | 12.5K | 12K | 30 | 18.4 cm |
| Under Armour size chart (opens the brand’s site) | 12.5K | 12 | 30 | 18.5 cm |
| Jordan size chart (opens the brand’s site) | 12.5C | 12 | 30 | 18.9 cm |
| Nike size chart (opens the brand’s site) | 12.5C | 12 | 30 | 18.9 cm |
| Converse size chart (opens the brand’s site) | 12.5C | 12 | 30 | — |
| Liberty size chart (opens the brand’s site) | 12.5C | 11.5C | 30 | — |
Each brand’s own kids’ chart, linked, as it prints the size; “—” where the chart has no such column. Brands that don’t print foot lengths are listed last. Not affiliated with any brand.
3 brands don’t make a 12.5C
Their kids’ charts skip it. For a foot that fills a 12.5C, up to 18.8 cm, their own charts give:
- Crocs size chart (opens the brand’s site) C13 to 19.1 cm
- Salomon size chart (opens the brand’s site) 13K to 19.0 cm
- UGG size chart (opens the brand’s site) 13K to 19.3 cm
Convert another kids’ size
12.5C in every system
| System | 12.5C |
|---|---|
| Foot length (cm) | 18.4–18.8 |
| Foot length (in) | 7.25–7.42 |
| UK | 12–12.5 |
| EU | 30–30.5 |
| Japan (cm) | 18.5–19 |
| Mondopoint (mm) | 185–190 |
From the standard size tables; where the foot range spans more than one size, the first and last are shown.
Size tables checked 2026-10-23; ages from the CPSC children’s survey (Snyder et al., 1977, via NIST AnthroKids), median of girls and boys; brand sizes from each brand’s own chart, linked above. An estimate to help you choose: fit varies by brand and model. Not medical advice.