AU to JP (cm) Shoe Size for Kids
5.5 AU size = 20 JP (cm) size ยท cohort-based size mapping for cm
Direct Answer
5.5 AU size equals 20 JP (cm) size
This result uses the selected cm cohort as the profile basis.
For 3 AU size, the cm cohort returns 18 JP (cm) size under the same mapping assumptions.
Converter Calculator
20 JP (cm) size
SwitchExplanation
AU converts to JP (cm) by first mapping AU to millimeters, then mapping millimeters to JP (cm). Cohort profile fixed: Kids.
AU size to JP (cm) size is cohort-bound here: the selected cm cohort controls the mapping used by calculator and reference table.
Keep the same cohort in both directions to avoid mixing shoe-size systems that use different wearer-group mappings.
Common Conversion Values
| AU size | JP (cm) size |
|---|---|
| 3 | 18 |
| 4.5 | 19 |
| 5.5 | 20 |
| 6.5 | 21 |
| 8 | 22 |
Frequently Asked Questions
How can I convert back from JP (cm) size to AU size?
Use the mirror JP (cm) size to AU size route; it applies the inverse relationship for the opposite direction with the same assumptions.
Does this page use cohort-specific mapping?
Yes. This page is fixed to Kids.
What formula is used for AU size to JP (cm) size?
The converter applies the formula defined for AU size to JP (cm) size, then renders rounded output for the direct answer and common-value rows.