Features Formati ISO della carta
Paper size refers to the size (length x height) of a sheet of paper.
The international paper size standard, ISO 216, is based on the German standard DIN 476.
The ISO sizes are all based on a single aspect ratio of the square root of 2.
The basic size is a 1 mΒ² sheet of paper (A0).
Later formats (A1, A2, A3 and so on) are obtained by simply cutting the paper in half on the longer side.
The most used and well-known format is A4 (210 Γ 297 mm).
In addition to the A series, there is a less common B series in conjunction with a C series.
The area of ββthe sheets in the B series is a geometric mean of the A sheets while the C series is used almost exclusively for envelopes and is defined in the standard ISO 269.
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