Apparel SizeShoe Size

CN to JP (cm) Shoe Size for Kids

Snapshot

33 CN size equals 20 JP (cm) size. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.

Reference basis: This result uses the selected cm cohort as the profile basis.
Example: For 29 CN size, the cm cohort returns 18 JP (cm) size under the same mapping assumptions.
Use the reverse page if you need the opposite direction with the same basis.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Interactive conversion

Converter Calculator

20 JP (cm) size

Switch

Machine access

Available to apps and AI agents

CN to JP (cm) Shoe Size for Kids can be requested through Conversion Encyclopedia's structured interfaces by software and compatible AI agents. The kids cohort identifies the sizing system used by the conversion.

Machine-readable identifiers

Conversion family: shoe-size
Source unit: cn
Target unit: jp-centimeters
Cohort: kids

The JSON API and OpenAPI specification use the identifiers to reach the conversion engine. WebMCP lets compatible AI agents request the same calculation.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "shoe-size",
  "value": 33,
  "from": "cn",
  "to": "jp-centimeters",
  "parameters": {
    "cohort": "kids"
  }
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "shoe-size",
    "value": 33,
    "from": "cn",
    "to": "jp-centimeters",
    "result": {
      "raw": 20,
      "display": "20"
    },
    "canonicalPath": "/apparel-size/shoe-size/cn-to-jp-centimeters-for-kids/"
  }
}

Full API documentation

Explanation

CN converts to JP (cm) by first mapping CN to millimeters, then mapping millimeters to JP (cm). Cohort profile fixed: Kids.

CN 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.

Method & Size Mapping

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

Common Conversion Values

CN size	JP (cm) size
29	18
31	19
33	20
35	21
37	22

Questions & answers

Frequently Asked Questions

Is the reverse shoe-size direction available?

Yes. The mirror page JP (cm) to CN (Kids) uses the inverse mapping path.

Which shoe-size cohort is used for CN to JP (cm)?

Kids sizing is fixed for this shoe-size mapping.

How is CN size to JP (cm) size calculated?

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