Size 11.5C: the kids’ shoe size explained
A size 11.5C fits a foot of 17.6 to 18.0 cm (6.92 to 7.08 in): UK 11–11.5 and EU 28.5–29 by the standard size tables, a little kid size.
The median child’s foot reaches the middle of an 11.5C at about 6 years and stays in it for about 6 months, in the US Consumer Product Safety Commission’s survey of children.
Where 11.5C sits
After 11.5C: the next sizes
The next size, 12C, fits 4.2 mm more foot, up to 18.4 cm. Around the age an 11.5C is outgrown the median child’s foot grows about 0.8 mm a month, so it fills a 12C about 5 months later.
| Size | Foot (cm) | UK | EU | Outgrown at |
|---|---|---|---|---|
| 11.5C (this size) | 17.6–18.0 | 11–11.5 | 28.5–29 | about 6 years |
| 12C | 18.0–18.4 | 11.5–12 | 29–30 | about 6½ years |
| 12.5C | 18.4–18.8 | 12–12.5 | 30–30.5 | about 7 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 7 brands print for an 11.5C
On the brands’ own charts an 11.5C is for a foot of up to 17.0 cm (Vans) to 17.9 cm (Nike); the standard is 18.0 cm. Check the brand’s chart before you buy.
| Brand | Prints | UK | EU | Foot up to |
|---|---|---|---|---|
| Vans size chart (opens the brand’s site) | 11.5C | 11 | 28 | 17.0 cm |
| adidas size chart (opens the brand’s site) | 11.5k | 11k | 29 | 17.4 cm |
| Under Armour size chart (opens the brand’s site) | 11.5K | 11 | 29 | 17.5 cm |
| On size chart (opens the brand’s site) | 11.5K | 11K | 29 | 17.6 cm |
| Jordan size chart (opens the brand’s site) | 11.5C | 11 | 28.5 | 17.9 cm |
| Nike size chart (opens the brand’s site) | 11.5C | 11 | 28.5 | 17.9 cm |
| Converse size chart (opens the brand’s site) | 11.5C | 11 | 28.5 | — |
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.
4 brands don’t make an 11.5C
Their kids’ charts skip it. For a foot that fills an 11.5C, up to 18.0 cm, their own charts give:
- Crocs size chart (opens the brand’s site) C12 to 18.3 cm
- Liberty size chart (opens the brand’s site) 12C
- Salomon size chart (opens the brand’s site) 12K to 18.5 cm
- UGG size chart (opens the brand’s site) 12T to 18.4 cm
Convert another kids’ size
11.5C in every system
| System | 11.5C |
|---|---|
| Foot length (cm) | 17.6–18.0 |
| Foot length (in) | 6.92–7.08 |
| UK | 11–11.5 |
| EU | 28.5–29 |
| Japan (cm) | 18 |
| Mondopoint (mm) | 180 |
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.