JP (cm) to UK Shoe Size for Kids
20 JP (cm) size = 5.5 UK size ยท cohort-based size mapping for cm
Direct Answer
20 JP (cm) size equals 5.5 UK size
This result uses the selected cm cohort as the profile basis.
For 18 JP (cm) size, the cm cohort returns 3 UK size under the same mapping assumptions.
Converter Calculator
5.5 UK size
SwitchExplanation
JP (cm) converts to UK by first mapping JP (cm) to millimeters, then mapping millimeters to UK. Cohort profile fixed: Kids.
From JP (cm) size to UK size, results depend on the selected cm 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.
Common Conversion Values
| JP (cm) size | UK size |
|---|---|
| 18 | 3 |
| 19 | 4.5 |
| 20 | 5.5 |
| 21 | 6.5 |
| 22 | 8 |
Frequently Asked Questions
How do I reverse JP (cm) size to UK size?
Use the mirror UK size to JP (cm) 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.
How does this converter compute JP (cm) size to UK size?
The converter applies the formula defined for JP (cm) size to UK size, then renders rounded output for the direct answer and common-value rows.