Half-A4 papersize - folded “the long way”

I'm trying to create a booklet A4 which is folded "the long way", in other words such that the resulting page size is not an A5 page but rather two A6 "on top" of each other.

I changed the paper size successfully by loading the article class with the a4paper option and putting in my preamble

\setlength{\paperwidth}{.5\paperwidth}


However, this of course didn't change any of the lengths controlling text width, margins etc. So I assume there must be another, better way.

How?

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Are you concerned about the folding as well? For example, are you trying to do something like this: PocketMod #1, #2. In that sense, does the following help: “Foldable” “Booklet” like Toodledo's one (pocketmod)? Give some feedback. –  Werner Jun 4 '12 at 19:42
@Werner: No, I'm not concerned with the folding - what I'm after is a pdf that works just like any other, with one page of the content on one page of the pdf, only with a different page size. I will then hand the pdf to a printing firm, that will print and fold everything for me. –  Tomas Lycken Jun 5 '12 at 0:21

You can use the geometry package, or the memoir document class for this. Here's an example with geometry (the kantian stuff is just to provide filler text):

\documentclass[a4paper,10pt]{article}
\usepackage{kantlipsum}
\usepackage[paperwidth=148mm]{geometry}
\begin{document}
\kant[1-8]
\end{document}


If that looks close to what you need, I suggest then reading the geometry or memoir documentation to make the other adjustments you need (such as tuning the margins).

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Giving a paperwidth option to geometry did the trick! I loaded the article class with the a4paper option, so I could even set paperwidth=.5\paperwidth in the options to get it right =) –  Tomas Lycken Jun 5 '12 at 0:30
Even better! {Grrr -- I wasted, like, two minutes looking up the dimensions of A6 :)} –  Brent.Longborough Jun 5 '12 at 11:10