Kids Size Guide — Castiron Grip
Kids Size Guide
Find their fit. First time, every time.
How to Measure
- Place your child's foot flat on a piece of paper
- Mark the heel and the tip of the longest toe
- Measure the distance in centimetres
- Match to the chart below
Measure both feet. Use the larger measurement.
Big Kids — EU 29–35
Castiron Grip Little ALIEN · ONE
| CM | US Size | EU Size |
|---|---|---|
| 17.0 | 11.5C | EU 29 |
| 17.5 | 12C | EU 30 |
| 18.5 | 13C | EU 31 |
| 19.0 | 1Y | EU 32 |
| 19.5 | 2Y | EU 33 |
| 20.5 | 3Y | EU 34 |
| 21.0 | 4Y | EU 35 |
Little Kids — EU 31–35
Castiron Grip HUG
| CM | US Size | EU Size |
|---|---|---|
| 18.5 | 13C | EU 31 |
| 19.0 | 1Y | EU 32 |
| 19.5 | 2Y | EU 33 |
| 20.5 | 3Y | EU 34 |
| 21.0 | 4Y | EU 35 |
Sizing Notes
Between sizes? Size up for comfort. Size down for a snugger performance fit.
Climbing shoes run slightly small. Order your child's normal size for a comfortable fit. As they progress and want more precision, go down 0.5 EU.
Growing fast? If your child is between sizes, go up — climbing shoes should fit snugly but never cause pain.
Quick Reference
- Child's foot is 19cm → US 1Y / EU 32
- Child's foot is 20.5cm → US 3Y / EU 34
- Child wears Nike US 2Y → EU 33 · Castiron Grip size EU 33
Ready to Move to Adult Sizing?
A US 5Y (EU 38) = Women's US 6.5 = Men's US 5.5. If your child is hitting EU 36–38, they're ready for adult sizing.
Still unsure? Email us at support@castiron-lift.com — we'll sort it.