# ISO 216

> international standard for paper sizes, including A4

**Wikidata**: [Q839751](https://www.wikidata.org/wiki/Q839751)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/International_standard_paper_sizes)  
**Source**: https://4ort.xyz/entity/iso-216


## References

1. Freebase Data Dumps. 2013
2. Recommendation X.660 (07/2011): Information technology – Procedures for the operation of object identifier registration authorities: General procedures and top arcs of the international object identifier tree