3.5Y (GS) in men’s and women’s sizes
A 3.5Y (grade school) is a men’s US 3.5 and a women’s US 5 by the standard size tables: Y sizes use men’s numbers.
UK 2.5, EU 34–34.5, for a foot of 21.2 to 21.6 cm.
2 of 9 brands map it differently on their own charts (Merrell, Saucony). Check the brand you’re buying.
How 9 brands map 3.5Y
| Brand · their big-kid size | On their adult chart | Foot, 3.5Y | Matched by |
|---|---|---|---|
| Converse size chart (opens the brand’s site)US 3.5Y | W US 5 | — | UK 3 |
| HOKA size chart (opens the brand’s site)US 3.5Y | W US 5 | 22.0 cm | foot ≤ 22.0 cm |
| Jordan size chart (opens the brand’s site)US 3.5Y | M US 3.5 · W US 5 | 22.2 cm | printed beside its US 3.5Y |
| Merrell size chart (opens the brand’s site)US 3.5 | W US 5.5 | 22.5 cm | EU 35.5 |
| New Balance size chart (opens the brand’s site)US 3.5 | M US 3.5 · W US 5 | 21.5 cm | printed beside its US 3.5 |
| Nike size chart (opens the brand’s site)US 3.5Y | M US 3.5 · W US 5 | 22.2 cm | printed beside its US 3.5Y |
| Saucony size chart (opens the brand’s site)3.5 Big Kids | M US 4.5 · W US 6 | 23.2 cm | printed beside its US 3.5 |
| Timberland size chart (opens the brand’s site)US 3.5 | W US 5 | 22.0 cm | EU 35.5 |
| Vans size chart (opens the brand’s site)EU 34.5 | W US 5 | 21.5 cm | EU 34.5 |
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 3.5Y, 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 3.5Y?
The median child’s foot reaches this size at about 10 years, in the US Consumer Product Safety Commission’s survey of children.
The foot each brand’s own chart makes 3.5Y for runs from 21.5 cm (Vans) to 23.2 cm (Saucony) across 9 charts; the standard size tables make it for a foot up to 21.6 cm. Pick the brand whose foot length is at or just above yours.
- Saucony 23.2 cm
- Merrell 22.5 cm
- Nike 22.2 cm
- HOKA 22.0 cm
- Timberland 22.0 cm
- adidas 21.6 cm
- On 21.6 cm
- New Balance 21.5 cm
- Vans 21.5 cm
Foot Locker and ASICS both call 3.5Y GS (grade school).
Convert another size
3.5Y in every system
| System | Size |
|---|---|
| Foot length (cm) | 21.2–21.6 |
| US men’s | 3.5 |
| US women’s | 5 |
| UK | 2.5 |
| EU | 34–34.5 |
| Mondopoint (mm) | 215–220 |
| Japan (cm) | 21.5–22 |
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.