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From: jlister@slhisc.uucp (John Lister)
Newsgroups: comp.lang.postscript,comp.text
Subject: Re: Looking for official size of A4 paper
Message-ID: <1991Feb20.164159.13877@slhisc.uucp>
Date: 20 Feb 91 16:41:59 GMT
References: <3390@polari.UUCP>
Distribution: na
Organization: Shearson Lehman Brothers, Inc.
Lines: 28

In article <3390@polari.UUCP> 6sigma2@polari.UUCP (Brian Matthews) writes:
>I'm looking for the "official" size for A4 paper.  I've looked in
>three different places so far, and have three different answers.  Sigh.
>It appears to be around 21cm x 29.7cm, but I'd like the true size,
>if it is, in fact, standardized.
>
>Thanks for your help.
>-- 
>Brian L. Matthews	6sigma2@polari.UUCP



A0 is one square meter, divided in such a ratio so that when you fold it in
half, the shape of the paper is the same.  If you can remember some algebra,
this works out to be that the ratio is one to square root of 2.  Thus, the
sizes of the various sheets are (worked out to the nearest millimeter):

A0   841 * 1189 mm
A1   595 *  841 mm
A2   420 *  595 mm
A3   297 *  420 mm
A4   210 *  297 mm

You can work the sizes out exactly, but my experience in the paper business is
that the rotary cutters which are used to produce bond paper are only accurate
to 1/2mm anyway.

John Lister.


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