Women’s 5.5 in men’s, men’s 4 in women’s
A women’s US 5.5 is a men’s US 4 by the standard size tables, and a men’s 4 is a women’s 5.5: women’s sizes run 1½ above men’s.
UK 3, EU 34.5–35.5, for a foot of 21.6 to 22.0 cm.
2 of 15 brands map it differently on their own charts (adidas, UGG). For men’s 4, 3 of 15 brands map it differently (adidas, HEYDUDE, UGG). Check the brand you’re buying.
How 15 brands map women’s 5.5
How 15 brands map men’s 4
From each brand’s own charts, linked: the other side’s size where the chart prints it beside this one, or both sizes on one row; otherwise the row on the other chart with the same EU (or UK) size; otherwise the nearest foot length, within 3 mm. “Foot” is the brand’s own foot length for the size in the heading, where its chart gives one, not for the size it maps to. Highlighted rows differ from the standard tables. Not affiliated with any brand.
Who wears women’s 5.5 and men’s 4?
In kids’ sizes, a women’s 5.5 is a 4Y by the standard size tables. Three big-kid charts print it beside a youth size: Nike (also Jordan) 4Y, New Balance 4Y and Saucony 3Y, so a pair from the kids’ range can fit the same foot. The median child’s foot reaches this size at about 10½ years, in the US Consumer Product Safety Commission’s survey of children.
The foot each brand’s own chart makes women’s 5.5 for runs from 22.0 cm (Vans) to 23.0 cm (Under Armour) across 16 charts; the standard size tables make it for a foot up to 22.0 cm. Pick the brand whose foot length is at or just above yours.
- Under Armour 23.0 cm
- Saucony 22.9 cm
- Teva 22.6 cm
- UGG 22.6 cm
- ANTA 22.6 cm
- SOREL 22.6 cm
- adidas 22.5 cm
- New Balance 22.5 cm
- Timberland 22.5 cm
- Nike 22.4 cm
- HOKA 22.4 cm
- KEEN 22.2 cm
- Clarks 22.1 cm
- Reebok 22.1 cm
- Salomon 22.0 cm
- Vans 22.0 cm
From the men’s side, the foot each brand’s men’s chart makes men’s 4 for runs from 22.0 cm (Nike and Jordan) to 22.9 cm (Saucony) across 9 charts.
- Saucony 22.9 cm
- Teva 22.6 cm
- ANTA 22.6 cm
- Timberland 22.5 cm
- adidas 22.1 cm
- UGG 22.1 cm
- HEYDUDE 22.0 cm
- New Balance 22.0 cm
- Nike 22.0 cm
In the US Army’s 2012 ANSUR II survey of 1,986 women, 1.0% (20) had a foot in this size’s range, 21.6 to 22.0 cm, and 1.4% had a foot of 22.0 cm or shorter; of the 4,082 men, under 1% (1) had a foot in it.
Convert another size
Women’s US 5.5 in every system
| System | Size |
|---|---|
| Foot length (cm) | 21.6–22.0 |
| US men’s | 4 |
| US kids (Y) | 4Y |
| UK | 3 |
| EU | 34.5–35.5 |
| Mondopoint (mm) | 220–225 |
| Japan (cm) | 22–22.5 |
From the standard size tables; where the foot range spans two sizes, both are shown.
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. Not medical advice.