# Setting specific values for page size and margins in Koma Script

I am using a two-sided, a5 paper scrbook for a document where I need to meet very concrete specifications, i.e. the page size needs to have a bleed margin of 3mm, so the size would be totalling 154mm x 216mm.

I came across the following possible solutions:

• \pdfpagewidth and \pdfpageheight as shown here
• the geometry package as shown here
• setting the paper and let the DIV be calculated as shown here

However, the first one did not seem to work, and the second and third lead to problems with the text taking way less space than I thought it to do, seemingly because of the fontsize of 10pt.

The first one does not seem to work at all, while setting the font to 10pt and using paper=154mm:216 leads to this, which has too much margin:

and adding DIV=calc as leads to this result, which has too few margin:

I actually want the same margin I get when I specify paper=A5 just with the smaller font and the added bleed:

So, what is the appropriate way to realize above specifications while not corrupting type area calculations or anything?

My code:

\documentclass[
paper=154mm:216mm, %does not help
DIV=calc, %does not help either
twoside,
fontsize=10pt]{scrbook}

\usepackage{showframe} % added to make it easier to see the layout
\usepackage{blindtext}

\begin{document}
\blindtext[2]
\end{document}

• Please show us a short compilable code with your actual settings for class scrbook ... The given information yet is too less ... – Mensch Nov 9 '17 at 18:42
• I do not really understand the question. However: If you want special margins use package geometry. You can change every layout parameter, if use this package. So if you have a problem with it, you may have used the wrong parameters and should show a MWE and tell, what is wrong. typearea does set \pdfpagewidth and \pdfpageheight on its own. If you want to change them manually, you should switch this off using option pagesize=false. See the manual for more information. – Schweinebacke Nov 9 '17 at 19:41

Maybe

\usepackage[width=154truemm,height=216truemm,center]{crop}


does what you want:

Code:

\documentclass[
twoside,
a5paper,
fontsize=10pt]{scrbook}

\usepackage{showframe} % added to make it easier to see the layout
\usepackage{blindtext}
\usepackage[width=154truemm,height=216truemm,center]{crop}

\begin{document}
\blindtext[2]
\end{document}