NEW SIZING CHART
| Approximate Age | US Size | European Size | Cm | Inches |
| Newborn | 1K | 16 | 8.9 | 3.5 |
| 1-3 months | 1.5K | 17 | 9.2 | 3.6 |
| 4-6 months | 2K | 17 | 9.5 | 3.75 |
| 6-8 months | 2.5K | 18 | 10.2 | 4 |
| 7-9 months | 3K | 18 | 10.5 | 4.1 |
| 9-11 months | 3.5K | 19 | 10.8 | 4.3 |
| 12-15 months | 4K | 19 | 11.4 | 4.5 |
| 15-18 months | 4.5K | 20 | 11.7 | 4.6 |
| 18 months | 5K | 20 | 12.1 | 4.75 |
| 21 months | 5.5K | 21 | 12.7 | 5 |
| 24 months | 6K | 22 | 13 | 5.125 |
| age 2 to 2.5 | 6.5K | 22 | 13.3 | 5.25 |
| age 2.5 to 3 | 7K | 23 | 14 | 5.5 |
| age 2.5 to 3 | 7.5K | 23 | 14.3 | 5.625 |
| age 3 to 3.5 | 8K | 24 | 14.6 | 5.75 |
| age 3 to 3.5 | 8.5K | 25 | 15.2 | 6 |
| age 3.5 to 4 | 9K | 26 | 15.6 | 6.125 |
| age 3.5 to 4 | 9.5K | 26 | 15.9 | 6.25 |
| age 4 to 4.5 | 10K | 27 | 16.5 | 6.5 |
| age 4 to 4.5 | 10.5K | 27 | 16.8 | 6.625 |
| age 4.5 to 5 | 11K | 28 | 17.1 | 6.75 |
| age 4.5 to 5 | 11.5K | 29 | 17.8 | 7 |
| age 5 to 5.5 | 12K | 30 | 18.1 | 7 |
| age 5 to 5.5 | 12.5K | 30 | 18.4 | 7.25 |
| age 5.5 to 6 | 13K | 31 | 19.1 | 7.5 |
| age 6 to 6.5 | 13.5K | 31 | 19.4 | 7.625 |
| age 7 | 1J | 32 | 19.7 | 7.75 |
| age 7.5 | 1.5J | 33 | 20.3 | 8 |
| age 8 | 2J | 33 | 20.6 | 8.125 |
| age 8.5 | 2.5J | 34 | 21 | 8.25 |
| age 9 | 3J | 34 | 21.6 | 8.5 |
| age 9.5 | 3.5J | 35 | 21.9 | 8.625 |
| age 10 | 4J | 36 | 22.2 | 8.75 |
| age 10.5 | 4.5J | 36 | 22.9 | 9 |
| age 11 | 5J | 37 | 23.2 | 9.125 |
| age 11.5 | 5.5J | 37 | 23.5 | 9.25 |
| age 12 | 6J | 38 | 24.1 | 9.5 |
| Teen Sizes | 6.5J | 38 | 24.4 | 9.625 |
| 7J | 39 | 24.8 | 9.75 | |
| 7.5J | 39 | 25.2 | 9.92 | |
| 8J | 40 | 25.5 | 10.04 | |
| 8.5J | 40 | 25.8 | 10.16 | |
| 9J | 41 | 26.1 | 10.28 | |
| 9.5J | 41 | 26.4 | 10.4 | |
| 10J | 42 | 26.7 | 10.5 |
