Size 1C: the kids’ shoe size explained
A size 1C fits a foot of 8.7 to 9.1 cm (3.42 to 3.58 in): UK 0.5–1 and EU 15.5–16 by the standard size tables, a toddler size.
The median child’s foot reaches the middle of a 1C at about 4 months and stays in it for about 1 month, in the US Consumer Product Safety Commission’s survey of children.
Where 1C sits
After 1C: the next sizes
The next size, 1.5C, fits 4.3 mm more foot, up to 9.5 cm. Around the age a 1C is outgrown the median child’s foot grows about 2.9 mm a month, so it fills a 1.5C about 1 month later.
| Size | Foot (cm) | UK | EU | Outgrown at |
|---|---|---|---|---|
| 1C (this size) | 8.7–9.1 | 0.5–1 | 15.5–16 | about 5 months |
| 1.5C | 9.1–9.5 | 1–1.5 | 16–16.5 | about 6 months |
| 2C | 9.5–9.95 | 1.5–2 | 16.5–17 | about 8 months |
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 a 1C
On the brands’ own charts a 1C is for a foot of up to 7.0 cm (Under Armour) to 9.1 cm (Nike); the standard is 9.1 cm. Check the brand’s chart before you buy.
| Brand | Prints | UK | EU | Foot up to |
|---|---|---|---|---|
| Under Armour size chart (opens the brand’s site) | 1K | 0.5 | 16 | 7.0 cm |
| adidas size chart (opens the brand’s site) | 1k | 0k | 16 | 8.1 cm |
| Vans size chart (opens the brand’s site) | 1C | 0.5 | 16 | 8.5 cm |
| Crocs size chart (opens the brand’s site) | C1 | — | — | 9.0 cm |
| Jordan size chart (opens the brand’s site) | 1C | 0.5 | 16 | 9.1 cm |
| Nike size chart (opens the brand’s site) | 1C | 0.5 | 16 | 9.1 cm |
| Converse size chart (opens the brand’s site) | 1C | 1 | 17 | — |
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
1C in every system
| System | 1C |
|---|---|
| Foot length (cm) | 8.7–9.1 |
| Foot length (in) | 3.42–3.58 |
| UK | 0.5–1 |
| EU | 15.5–16 |
| Japan (cm) | 9–9.5 |
| Mondopoint (mm) | 90–95 |
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.