Crocs kids sizes
Roomy by design: buy the measured size
Crocs' own scale runs from C4 to C13 for the smallest and continues with J sizes. Every size is listed with a foot length: a 16.5 cm foot takes C10, roughly EU 27–28. Measure the foot and read the table.
The shoes are built roomy: the foot is meant to move and the strap does the holding. That is why Crocs' own advice is to stay at the measured size. A Crocs bought big becomes a slipper that comes off in the sandpit.
Crocs kids sizes, C4 to J3
| Crocs | EU | Foot (cm) |
|---|---|---|
| C4 | 19–20 | 11.7 |
| C5 | 20–21 | 12.5 |
| C6 | 22–23 | 13.2 |
| C7 | 23–24 | 14 |
| C8 | 24–25 | 14.9 |
| C9 | 25–26 | 15.7 |
| C10 | 27–28 | 16.5 |
| C11 | 28–29 | 17.4 |
| C12 | 29–30 | 18.3 |
| C13 | 30–31 | 19.1 |
| J1 | 32–33 | 19.8 |
| J2 | 33–34 | 20.6 |
| J3 | 34–35 | 21.4 |
Two quick answers
Should you size up in Crocs?
No. The room is already built in and the strap holds the foot. Measure and buy the size the number points to.
What is C10 in EU sizes?
Roughly EU 27–28, for a foot around 16.5 cm. The C scale ends at C13, then the J sizes take over up to EU 34–35.
Keep reading
Source
Measurements from the manufacturer's own chart, checked August 10, 2026.