4.5Y (GS) in men’s and women’s sizes
A 4.5Y (grade school) is a men’s US 4.5 and a women’s US 6 by the standard size tables: Y sizes use men’s numbers.
UK 3.5, EU 35.5–36, for a foot of 22.0 to 22.4 cm.
6 of 13 brands map it differently on their own charts (adidas, Converse, HOKA and 3 more). Check the brand you’re buying.
How 13 brands map 4.5Y
| Brand · their big-kid size | On their adult chart | Foot, 4.5Y | Matched by |
|---|---|---|---|
| adidas size chart (opens the brand’s site)US 4.5 | M US 4.5 · W US 5.5 | 22.5 cm | EU 36 2/3 |
| Converse size chart (opens the brand’s site)US 4.5Y | W US 6.5 | — | EU 37 |
| HOKA size chart (opens the brand’s site)US 4.5Y | M US 5 · W US 6 | 23.0 cm | foot ≤ 23.0 cm |
| Jordan size chart (opens the brand’s site)US 4.5Y | M US 4.5 · W US 6 | 22.7 cm | printed beside its US 4.5Y |
| Merrell size chart (opens the brand’s site)US 4.5 | W US 6 | 23.5 cm | UK 3.5 |
| New Balance size chart (opens the brand’s site)US 4.5 | M US 4.5 · W US 6 | 22.5 cm | printed beside its US 4.5 |
| Nike size chart (opens the brand’s site)US 4.5Y | M US 4.5 · W US 6 | 22.7 cm | printed beside its US 4.5Y |
| On size chart (opens the brand’s site)US 4.5Y | W US 5.5 | 22.4 cm | EU 36.5 |
| PUMA size chart (opens the brand’s site)US 4.5 | W US 6 | — | EU 36 |
| Saucony size chart (opens the brand’s site)4.5 Big Kids | M US 5.5 · W US 7 | 24.1 cm | printed beside its US 4.5 |
| SOREL size chart (opens the brand’s site)US 4.5 | W US 5 | 22.6 cm | EU 36 |
| Timberland size chart (opens the brand’s site)US 4.5 | M US 4.5 · W US 6 | 22.5 cm | EU 37 |
| Vans size chart (opens the brand’s site)EU 36 | W US 6 | 22.5 cm | EU 36 |
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 4.5Y, 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 4.5Y?
The median child’s foot reaches this size at about 11 years, in the US Consumer Product Safety Commission’s survey of children.
The foot each brand’s own chart makes 4.5Y for runs from 22.4 cm (On) to 24.1 cm (Saucony) across 10 charts; the standard size tables make it for a foot up to 22.4 cm. Pick the brand whose foot length is at or just above yours.
- Saucony 24.1 cm
- Merrell 23.5 cm
- HOKA 23.0 cm
- Nike 22.7 cm
- SOREL 22.6 cm
- adidas 22.5 cm
- New Balance 22.5 cm
- Timberland 22.5 cm
- Vans 22.5 cm
- On 22.4 cm
Foot Locker and ASICS both call 4.5Y GS (grade school).
Convert another size
4.5Y in every system
| System | Size |
|---|---|
| Foot length (cm) | 22.0–22.4 |
| US men’s | 4.5 |
| US women’s | 6 |
| UK | 3.5 |
| EU | 35.5–36 |
| Mondopoint (mm) | 225 |
| Japan (cm) | 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.