| US / CA | EU | UK | Foot Length | Age Group |
|---|---|---|---|---|
| Infant 0 | 15 | 0 | 3.3 | 0-12 months |
| Infant 1 | 16 | 0.5 | 3.5 | 0-12 months |
| Infant 1.5 | 17 | 1 | 3.6 | 0-12 months |
| Infant 2 | 17 | 1 | 3.8 | 0-12 months |
| Infant 2.5 | 18 | 1.5 | 4 | 0-12 months |
| Infant 3 | 18 | 2 | 4.2 | 12-24 months |
| Infant 3.5 | 19 | 2.5 | 4.3 | 12-24 months |
| Toddler 4 | 19 | 3 | 4.5 | 12-24 months |
| Toddler 4.5 | 20 | 3.5 | 4.6 | 12-24 months |
| Toddler 5 | 20 | 4 | 4.8 | 12-24 months |
| Toddler 5.5 | 21 | 4.5 | 5 | 12-24 months |
| Toddler 6 | 22 | 5 | 5.1 | 12-24 months |
| Toddler 6.5 | 22 | 5.5 | 5.3 | 12-24 months |
| Toddler 7 | 23 | 6 | 5.5 | 12-24 months |
| Toddler 7.5 | 23 | 6.5 | 5.6 | 2-4 years |
| Toddler 8 | 24 | 7 | 5.8 | 2-4 years |
| Toddler 8.5 | 25 | 7.5 | 6 | 2-4 years |
| Toddler 9 | 25 | 8 | 6.2 | 2-4 years |
| Toddler 9.5 | 26 | 8.5 | 6.3 | 2-4 years |
| Toddler 10 | 27 | 9 | 6.5 | 2-4 years |
| Toddler 10.5 | 27 | 9.5 | 6.6 | 2-4 years |
| Little Kid 11 | 28 | 10 | 6.8 | 4-6 years |
| Little Kid 11.5 | 29 | 10.5 | 7 | 4-6 years |
| Little Kid 12 | 30 | 11 | 7.1 | 4-6 years |
| Little Kid 12.5 | 30 | 11.5 | 7.3 | 4-6 years |
| Little Kid 13 | 31 | 12 | 7.5 | 4-6 years |
| Little Kid 13.5 | 31 | 12.5 | 7.7 | 4-6 years |
| Little Kid 1 | 32 | 13 | 7.8 | 4-6 years |
| Little Kid 1.5 | 33 | 13.5 | 8 | 4-6 years |
| Little Kid 2 | 33 | 1 | 8.1 | 6-9 years |
| Little Kid 2.5 | 34 | 1.5 | 8.3 | 6-9 years |
| Big Kid 3 | 34 | 2 | 8.5 | 6-9 years |
| Big Kid 3.5 | 35 | 2.5 | 8.7 | 6-9 years |
| Big Kid 4 | 36 | 3 | 8.8 | 6-9 years |
| Big Kid 4.5 | 36 | 3.5 | 9 | 6-9 years |
| Big Kid 5 | 37 | 4 | 9.1 | 6-9 years |
| US / CA | EU | UK | Foot Length | Age Group |
|---|---|---|---|---|
| Infant 0 | 15 | 0 | 8.4 | 0-12 months |
| Infant 1 | 16 | 0.5 | 8.9 | 0-12 months |
| Infant 1.5 | 17 | 1 | 9.1 | 0-12 months |
| Infant 2 | 17 | 1 | 9.7 | 0-12 months |
| Infant 2.5 | 18 | 1.5 | 10.2 | 0-12 months |
| Infant 3 | 18 | 2 | 10.7 | 12-24 months |
| Infant 3.5 | 19 | 2.5 | 10.9 | 12-24 months |
| Toddler 4 | 19 | 3 | 11.4 | 12-24 months |
| Toddler 4.5 | 20 | 3.5 | 11.7 | 12-24 months |
| Toddler 5 | 20 | 4 | 12.2 | 12-24 months |
| Toddler 5.5 | 21 | 4.5 | 12.7 | 12-24 months |
| Toddler 6 | 22 | 5 | 13 | 12-24 months |
| Toddler 6.5 | 22 | 5.5 | 13.5 | 12-24 months |
| Toddler 7 | 23 | 6 | 14 | 12-24 months |
| Toddler 7.5 | 23 | 6.5 | 14.2 | 2-4 years |
| Toddler 8 | 24 | 7 | 14.7 | 2-4 years |
| Toddler 8.5 | 25 | 7.5 | 15.2 | 2-4 years |
| Toddler 9 | 25 | 8 | 15.7 | 2-4 years |
| Toddler 9.5 | 26 | 8.5 | 16 | 2-4 years |
| Toddler 10 | 27 | 9 | 16.5 | 2-4 years |
| Toddler 10.5 | 27 | 9.5 | 16.8 | 2-4 years |
| Little Kid 11 | 28 | 10 | 17.3 | 4-6 years |
| Little Kid 11.5 | 29 | 10.5 | 17.8 | 4-6 years |
| Little Kid 12 | 30 | 11 | 18 | 4-6 years |
| Little Kid 12.5 | 30 | 11.5 | 18.5 | 4-6 years |
| Little Kid 13 | 31 | 12 | 19 | 4-6 years |
| Little Kid 13.5 | 31 | 12.5 | 19.6 | 4-6 years |
| Little Kid 1 | 32 | 13 | 19.8 | 4-6 years |
| Little Kid 1.5 | 33 | 13.5 | 20.3 | 4-6 years |
| Little Kid 2 | 33 | 1 | 20.6 | 6-9 years |
| Little Kid 2.5 | 34 | 1.5 | 21.1 | 6-9 years |
| Big Kid 3 | 34 | 2 | 21.6 | 6-9 years |
| Big Kid 3.5 | 35 | 2.5 | 22.1 | 6-9 years |
| Big Kid 4 | 36 | 3 | 22.4 | 6-9 years |
| Big Kid 4.5 | 36 | 3.5 | 22.9 | 6-9 years |
| Big Kid 5 | 37 | 4 | 23.1 | 6-9 years |