Australian kids' sizing **differs significantly** from US. **AU sizes ≈ child's age in years** (but based on height/cm). US sizes are **age-based but run larger**.
| US Size | AU Size | Child Height (cm) | Approx. Age |
|---|---|---|---|
| Toddlers (2T–5T) | |||
| 2T | 1 | 84–90 | 1–2 yr |
| 3T | 2 | 90–96 | 2–3 yr |
| 4T | 3 | 96–102 | 3–4 yr |
| 5T | 4 | 102–108 | 4–5 yr |
| Little Kids (4–6X) | |||
| 4 | 4 | 102–108 | 4–5 yr |
| 5 | 5 | 108–114 | 5–6 yr |
| 6 / 6X | 6 | 114–120 | 6–7 yr |
| Big Kids (7–16) | |||
| 7 | 8 | 120–126 | 7–8 yr |
| 8 | 10 | 126–132 | 8–9 yr |
| 10 | 12 | 132–138 | 9–10 yr |
| 12 | 14 | 138–144 | 11–12 yr |
| 14 | 16 | 144–152 | 13–14 yr |
| 16 | 18 | 152–160 | 15–16 yr |