01 /Examples and fit notes
Body measure
3 cun is about 10 cm.
Length note
12 cun is about 40 cm.
Important note
This uses modern mainland chi and cun values.
Note 2
Traditional medicine references may use body-relative cun in some contexts.
02 /How to use this lookup
This page answers one specific search intent. For a full table, reverse conversion, nearby units or a live calculator input, use the linked main converter.
When a Chinese listing includes both a label and a metric value, use the metric value first. Labels are useful shortcuts, but centimeters, kilograms and square meters are easier to verify.
03 /Modern Chinese unit context
For modern mainland China, length pages use metric anchors such as 1 chi = 33.33 cm and 1 cun = 3.333 cm. Historical architecture or older texts can use different values.
For the broader chart and source caveats, read the Chinese units conversion chart. It explains when jin, catty, mu, li, chi, cun and related units are safe to convert with modern mainland values.