# square millimetre

> unit of area

**Wikidata**: [Q2737347](https://www.wikidata.org/wiki/Q2737347)  
**Source**: https://4ort.xyz/entity/square-millimetre


## References

1. Recommendation N. 20 - Codes for Units of Measure Used in International Trade - Revision 13 (Annexes I to III)