AU to CN Shoe Size for Kids

5.5 AU size = 33 CN size · cohort-based size mapping for selected cohort

Direct Answer

5.5 AU size equals 33 CN size

This result uses the selected selected cohort cohort as the profile basis.

For 3 AU size, the selected cohort cohort returns 29 CN size under the same mapping assumptions.

Converter Calculator

33 CN size

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Explanation

AU converts to CN by first mapping AU to millimeters, then mapping millimeters to CN. Cohort profile fixed: Kids.

From AU size to CN size, results depend on the selected selected cohort cohort and stay consistent with that cohort across table rows and calculator input.

Keep the same cohort in both directions to avoid mixing shoe-size systems that use different wearer-group mappings.

Method & Size Mapping

Model basis: output depends on the selected shoe-size cohort and follows the same cohort mapping in both directions.
Profile reference: selected cohort cohort.
Consistency rule: calculator output and table values keep the same shoe-size cohort in both directions.

Common Conversion Values

AU size	CN size
3	29
4.5	31.5
5.5	33
6.5	34.5
8	37

Frequently Asked Questions

How can I convert back from CN size to AU size?

Use the mirror CN 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 CN size?

The converter applies the formula defined for AU size to CN size, then renders rounded output for the direct answer and common-value rows.