| Estimated Age | American Size | European Size |
| 0 month | 0K | 15 |
| 3 months | 1K | 16 |
| 6 months | 2K | 17 |
| 9 months | 3K | 18 |
| 12-15 months | 4K | 19 |
| 15-18 months | 5K | 20 |
| 18-21 months | 5.5K | 21 |
| 21-24 months | 6K | 22 |
| 2-3 years | 7K | 23 |
| 3 years | 8K | 24 |
| 3.5 years | 9K | 25 |
| 4 years | 9.5K | 26 |
| 4.5 years | 10K | 27 |
| 5 years | 11K | 28 |
| 5.5 years | 11.5K | 29 |
| 6 years | 12K | 30 |
| 6.5 years | 13K | 31 |
| 7 years | 1J | 32 |
| 7-8 years | 2J | 33 |
| 8-9 years | 3J | 34 |
| 9-10 years | 4J | 35 |
| 10-11 years | 5J | 36 |
| 10-11 years | 5.5J | 37 |
| 10-11 years | 6J | 38 |
| 11-12 years | 6.5J | 38 |
| 13-14 years | 7J | 39 |
| 13-14 years | 7.5J | 39 |
| 14-15 years | 8J | 40 |
| 14-15 years | 8.5J | 40 |
Eligible for 30-day refund or exchange for online purchases only.
Items must be unused, in original packaging. No returns on worn/used items or clearance items at 50% off or more.
