Envelope Labels
\documentclass{letter}
\usepackage[a4paper]{geometry}
\usepackage[british]{babel}
\usepackage{graphicx}
\usepackage{envlab}
\SetBigLabel{101mm}{139mm}{9mm}{3mm}{2mm}{2}{2}
\renewcommand{\PrintBigLabel}[2]{%
\begin{minipage}[t][\LabelHeight]{\LabelWidth}
\hspace*{1em}%
\rotatebox[origin=l]{90}{\PrintReturnAddress{#1}}\hfill
\rule{0.1pt}{\ToAddressWidth}\hfill
\rotatebox[origin=l]{90}{\PrintAddress{#2}}%
\hspace*{1em}%
\end{minipage}%
}
\makelabels
\name{Mr Big Head}
\signature{Big Head}
\location{Secret Lab of Experimental Stuff}
\address{University of Somewhere\\Some City\\AB3 4YZ}
\telephone{0123456789}
\begin{document}
\begin{letter}{Miss Polly Parrot\\42 The Lane\\Some Town\\AB1 2XY}
\opening{Dear Miss Parrot}
\thispagestyle{firstpage}
This is an imaginary letter.
This is the second paragraph of the letter.
\closing{Yours sincerely}
\ps PS: this is a postscript.
\encl{Photocopy of something interesting\\
Photocopy of something rather dull}
\cc{Prof Important Person\\Dr Bor Ing}
\end{letter}
\begin{letter}{Miss Polly Parrot\\42 The Lane\\Some Town\\AB1 2XY}
\opening{Dear Miss Parrot}
\thispagestyle{firstpage}
This is an imaginary letter.
This is the second paragraph of the letter.
\closing{Yours sincerely}
\ps PS: this is a postscript.
\encl{Photocopy of something interesting\\
Photocopy of something rather dull}
\cc{Prof Important Person\\Dr Bor Ing}
\end{letter}
\begin{letter}{Miss Polly Parrot\\42 The Lane\\Some Town\\AB1 2XY}
\opening{Dear Miss Parrot}
\thispagestyle{firstpage}
This is an imaginary letter.
This is the second paragraph of the letter.
\closing{Yours sincerely}
\ps PS: this is a postscript.
\encl{Photocopy of something interesting\\
Photocopy of something rather dull}
\cc{Prof Important Person\\Dr Bor Ing}
\end{letter}
\end{document}
Download sample-envlab.tex or sample-envlab.pdf.