> ISO 216 defines the A series of paper sizes based on these simple principles:
> - The height divided by the width of all formats is the square root of two (1.4142).
> - Format A0 has an area of one square meter.
When we look on A0 papers on the market mostly it's size is 841 mm × 1189 mm, that is not correspond to this standard:
- Length Ratio: 1189/841 = 1.41379310345 (should be 1.4142)
- Area: 0.999949 m² (should be 1.0 m²)
P.S. There are few websites which are useful for retrieving various paper formats sizes.[0,1]