If one were type setting a business letter on A4 paper he might use:
\setlength{\textheight}{215mm}
\setlength{\textwidth}{160mm}
\setlength{\oddsidemargin}{0pt}
\setlength{\topmargin}{-20pt}
\setlength{\headsep}{35pt}
\setlength{\textwidth}{160mm}
\setlength{\evensidemargin}{0pt}
\setlength{\headheight}{12pt}
Is this correct for A4 size paper? And what would the measurements be for letter paper?
scrlttr2
you get a very good typing area for example for german letters.