Size 3.5C: the kids’ shoe size explained
A size 3.5C fits a foot of 10.8 to 11.2 cm (4.25 to 4.42 in): UK 3–3.5 and EU 18.5–19 by the standard size tables, a toddler size.
The median child’s foot reaches the middle of a 3.5C at about 12 months and stays in it for about 2 months, in the US Consumer Product Safety Commission’s survey of children.
Where 3.5C sits
After 3.5C: the next sizes
The next size, 4C, fits 4.2 mm more foot, up to 11.6 cm. Around the age a 3.5C is outgrown the median child’s foot grows about 1.1 mm a month, so it fills a 4C about 4 months later.
| Size | Foot (cm) | UK | EU | Outgrown at |
|---|---|---|---|---|
| 3.5C (this size) | 10.8–11.2 | 3–3.5 | 18.5–19 | about 13 months |
| 4C | 11.2–11.6 | 3.5–4 | 19–19.5 | about 14 months |
| 4.5C | 11.6–12.1 | 4–4.5 | 19.5–20.5 | about 18 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 2 brands print for a 3.5C
| Brand | Prints | UK | EU | Foot up to |
|---|---|---|---|---|
| Vans size chart (opens the brand’s site) | 3.5C | 3 | 18.5 | 10.5 cm |
| Converse size chart (opens the brand’s site) | 3.5C | 3.5 | 19.5 | — |
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.
7 brands don’t make a 3.5C
Their kids’ charts skip it (most toddler charts print whole sizes only). For a foot that fills a 3.5C, up to 11.2 cm, their own charts give:
- adidas size chart (opens the brand’s site) 5k to 11.5 cm
- Crocs size chart (opens the brand’s site) C4 to 11.5 cm
- Jordan size chart (opens the brand’s site) 4C to 11.6 cm
- Liberty size chart (opens the brand’s site) 4C
- Nike size chart (opens the brand’s site) 4C to 11.6 cm
- Teva size chart (opens the brand’s site) 4T to 11.5 cm
- Under Armour size chart (opens the brand’s site) 6K to 12.0 cm
Convert another kids’ size
3.5C in every system
| System | 3.5C |
|---|---|
| Foot length (cm) | 10.8–11.2 |
| Foot length (in) | 4.25–4.42 |
| UK | 3–3.5 |
| EU | 18.5–19 |
| Japan (cm) | 11–11.5 |
| Mondopoint (mm) | 110–115 |
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.