Size 11C: the kids’ shoe size explained
A size 11C fits a foot of 17.1 to 17.6 cm (6.75 to 6.92 in): UK 10.5–11 and EU 28–28.5 by the standard size tables, a little kid size.
The median child’s foot reaches the middle of an 11C at about 5½ years and stays in it for about 6 months, in the US Consumer Product Safety Commission’s survey of children.
Where 11C sits
After 11C: the next sizes
The next size, 11.5C, fits 4.2 mm more foot, up to 18.0 cm. Around the age an 11C is outgrown the median child’s foot grows about 0.8 mm a month, so it fills an 11.5C about 5 months later.
| Size | Foot (cm) | UK | EU | Outgrown at |
|---|---|---|---|---|
| 11C (this size) | 17.1–17.6 | 10.5–11 | 28–28.5 | about 5½ years |
| 11.5C | 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 |
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 13 brands print for an 11C
On the brands’ own charts an 11C is for a foot of up to 16.5 cm (Vans) to 17.6 cm (Nike); the standard is 17.6 cm. Check the brand’s chart before you buy.
| Brand | Prints | UK | EU | Foot up to |
|---|---|---|---|---|
| Vans size chart (opens the brand’s site) | 11C | 10.5 | 27.5 | 16.5 cm |
| adidas size chart (opens the brand’s site) | 11k | 10.5k | 28.5 | 17.0 cm |
| Under Armour size chart (opens the brand’s site) | 11K | 10.5 | 28 | 17.0 cm |
| On size chart (opens the brand’s site) | 11K | 10.5K | 28.5 | 17.1 cm |
| Crocs size chart (opens the brand’s site) | C11 | 11 | 26-27 | 17.4 cm |
| Salomon size chart (opens the brand’s site) | 11K | 10.5K | 29 | 17.5 cm |
| UGG size chart (opens the brand’s site) | 11T | 10 | 28.5 | 17.6 cm |
| Jordan size chart (opens the brand’s site) | 11C | 10.5 | 28 | 17.6 cm |
| Nike size chart (opens the brand’s site) | 11C | 10.5 | 28 | 17.6 cm |
| ASICS size chart (opens the brand’s site) | K11 | K10 | 28.5 | — |
| Converse size chart (opens the brand’s site) | 11C | 10.5 | 28 | — |
| Liberty size chart (opens the brand’s site) | 11C | 10C | 28 | — |
| Onitsuka Tiger size chart (opens the brand’s site) | K11 | K10 | 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.
Convert another kids’ size
11C in every system
| System | 11C |
|---|---|
| Foot length (cm) | 17.1–17.6 |
| Foot length (in) | 6.75–6.92 |
| UK | 10.5–11 |
| EU | 28–28.5 |
| Japan (cm) | 17.5–18 |
| Mondopoint (mm) | 175–180 |
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.