US to JP (cm) Shoe Size for Kids
6.5 US size = 20 JP (cm) size ยท cohort-based size mapping for cm
Direct Answer
6.5 US size equals 20 JP (cm) size
This result uses the selected cm cohort as the profile basis.
For 4 US size, the cm cohort returns 18 JP (cm) size under the same mapping assumptions.
Converter Calculator
20 JP (cm) size
SwitchExplanation
US converts to JP (cm) by first mapping US to millimeters, then mapping millimeters to JP (cm). Cohort profile fixed: Kids.
For US size to JP (cm) size, the active cm cohort determines the conversion constants applied to every value.
Keep the same cohort in both directions to avoid mixing shoe-size systems that use different wearer-group mappings.
Common Conversion Values
| US size | JP (cm) size |
|---|---|
| 4 | 18 |
| 5.5 | 19 |
| 6.5 | 20 |
| 7.5 | 21 |
| 9 | 22 |
Frequently Asked Questions
What is the opposite direction for US size to JP (cm) size?
Use the mirror JP (cm) size to US 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 is US size to JP (cm) size calculated?
The converter applies the formula defined for US size to JP (cm) size, then renders rounded output for the direct answer and common-value rows.