\documentclass[a4paper]{article}

\usepackage{gcheck}
\usepackage[textwidth=15cm,textheight=20cm,
            noheadfoot,nomarginpar,
            marginratio={1:1,1:5}
%           hmarginratio=1:1, vmarginratio=1:5
%           ratio={1:1, 1:5}
            ]{geometry}
\geometry{showframe,dvips}

\begin{document}
\nompstring
\manyfoxes\manyfoxes\manyfoxes\manyfoxes
\manyfoxes\manyfoxes\manyfoxes\manyfoxes

\typeout{}
\dcheck\paperwidth{597.50787pt}
\dcheck\paperheight{845.04684pt}
\dcheck\textwidth{426.79134pt}
\dcheck\textheight{569.05511pt}
\dcheck\oddsidemargin{13.08827pt}
\dcheck\evensidemargin{13.08827pt}
\dcheck\topmargin{-26.27138pt}
\dcheck\headheight{0pt}
\dcheck\headsep{0pt}
\dcheck\footskip{0pt}
\dcheck\marginparwidth{0pt}
\dcheck\marginparsep{0pt}
\dcheck\columnsep{10pt}
\dcheck\hoffset{0pt}
\dcheck\voffset{0pt}
\ccheck\mag{1000}
\checkresults
\typeout{}

\end{document}
