4Y (GS) in men’s and women’s sizes
A 4Y (grade school) is a men’s US 4 and a women’s US 5.5 by the standard size tables: Y sizes use men’s numbers.
UK 3, EU 34.5–35.5, for a foot of 21.6 to 22.0 cm.
7 of 17 brands map it differently on their own charts (adidas, Golden Goose, KEEN and 4 more). Check the brand you’re buying.
How 17 brands map 4Y
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 4Y, 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 4Y?
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 4Y for runs from 22.0 cm (Veja) to 23.8 cm (Saucony) across 15 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.
- Saucony 23.8 cm
- Golden Goose 23.5 cm
- ANTA 23.0 cm
- Merrell 23.0 cm
- HOKA 22.5 cm
- Timberland 22.5 cm
- Nike 22.4 cm
- Campus 22.2 cm
- KEEN 22.2 cm
- SOREL 22.2 cm
- adidas 22.1 cm
- New Balance 22.0 cm
- On 22.0 cm
- Vans 22.0 cm
- Veja 22.0 cm
Foot Locker and ASICS both call 4Y GS (grade school).
Convert another size
4Y in every system
| System | Size |
|---|---|
| Foot length (cm) | 21.6–22.0 |
| US men’s | 4 |
| US women’s | 5.5 |
| 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.