US 4 in EU and UK sizes
A men’s US 4 (or 4Y) is EU 34.5–35.5 and UK 3; a women’s US 4 is EU 32.5–33.5 and UK 1.5 by the standard size tables.
The men’s fits a foot of 21.6 to 22.0 cm and the women’s fits a foot of 20.3 to 20.7 cm. A kids’ 4C is much smaller: EU 19–19.5, for a foot of up to 11.6 cm.
Three shoes called US 4
The number alone doesn’t say whose size it is. For the same US 4, each is for a different foot:
US 4 in every size system
| System | Men’s US 4 | Women’s US 4 | Kids’ 4C |
|---|---|---|---|
| Foot length (cm) | 21.6–22.0 | 20.3–20.7 | 11.2–11.6 |
| Foot length (in) | 8.50–8.67 | 8.00–8.17 | 4.42–4.58 |
| EU | 34.5–35.5 | 32.5–33.5 | 19–19.5 |
| UK | 3 | 1.5 | 3.5–4 |
| Japan (cm) | 22–22.5 | 20.5–21 | 11.5–12 |
| Mondopoint (mm) | 220–225 | 205–210 | 115–120 |
| Australia and NZ | 3 | 4 | 3.5–4 |
| India (UK sizes) | 3 | 1.5 | 3.5–4 |
| South Korea and China (mm) | 220–225 | 205–210 | 115–120 |
| Brazil | 33–34 | 31–32 | 17–18 |
From the standard size tables; where the foot range spans more than one size, the first and last are shown.
What 21 brands print next to a US 4
Each brand’s own chart, on the row for its US 4: brands differ by half a size or more in UK and EU.
As printed on each brand’s chart, linked; “—” where the chart has no such size or column. Not affiliated with any brand.
Convert another size
Size tables checked 2026-10-23; brand sizes from each brand’s own charts, linked above. An estimate to help you choose: fit varies by brand and model.