See also: Appendix:Variations of "ao"
See the Wikipedia article ISO 216, the international standard on paper sizes.
- The base size in the series of the international standard. Set such that it has an area of 1 square metre, where the ratio between the width and the length equals square root of 2. The width of each size is equal to the length of next smaller size.
- dimensions: 1189 x 841 mm (1189.21 x 840.90 mm)
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