5.5Y (GS) in men’s and women’s sizes
A 5.5Y (grade school) is a men’s US 5.5 and a women’s US 7 by the standard size tables: Y sizes use men’s numbers.
UK 4.5, EU 36.5–37, for a foot of 22.9 to 23.3 cm.
5 of 14 brands map it differently on their own charts (adidas, Converse, Golden Goose and 2 more). Check the brand you’re buying.
How 14 brands map 5.5Y
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 5.5Y, 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 5.5Y?
The median child’s foot reaches this size at about 12 years, in the US Consumer Product Safety Commission’s survey of children.
The foot each brand’s own chart makes 5.5Y for runs from 23.3 cm (On) to 25.0 cm (Golden Goose) across 11 charts; the standard size tables make it for a foot up to 23.3 cm. Pick the brand whose foot length is at or just above yours.
- Golden Goose 25.0 cm
- Saucony 24.8 cm
- Merrell 24.5 cm
- ANTA 24.0 cm
- HOKA 24.0 cm
- New Balance 23.5 cm
- Nike 23.5 cm
- Timberland 23.5 cm
- Vans 23.5 cm
- adidas 23.3 cm
- On 23.3 cm
Foot Locker and ASICS both call 5.5Y GS (grade school).
Convert another size
5.5Y in every system
| System | Size |
|---|---|
| Foot length (cm) | 22.9–23.3 |
| US men’s | 5.5 |
| US women’s | 7 |
| UK | 4.5 |
| EU | 36.5–37 |
| Mondopoint (mm) | 230–235 |
| Japan (cm) | 23–23.5 |
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.