A5-paper document with 55 letter on one line

Is it possible to write a document for A5-paper such that I can configure its margin widths and letter spacing such that a line contains at most roughly 55 letters?

• Are you using a monospace font? If not, you might run into trouble that an "m" is wider than an "i"... – cslstr Mar 19 '14 at 21:52
• Not necessary. The problem is that I was writing a book for my customer and she wants me to write the book with paper size given in another book. So that 55 is an approximate number of letters one line contains. – Beginning Mar 19 '14 at 21:54
• – Werner Mar 19 '14 at 22:27

You can use the geometry package to set your margins how you like, and add Koma-script functionality with scrextend to set the base font size with \changefontsizes.

\documentclass[10pt]{book}

\usepackage{blindtext}

\usepackage[a5paper]{geometry}
%\usepackage[a5paper, top=2in, bottom=1.5in, left=1in, right=1in]{geometry}

\usepackage{scrextend}
\changefontsizes{10.0pt}  % Change base font size

\begin{document}

\blinddocument

\end{document}


It looks like that first line has 53-55 characters in it...