\documentclass{article}
\usepackage{web}
\margins{0pt}{0pt}{0pt}{0pt}   %% Kein Seitenrand
\screensize{110mm}{180mm}      %% Dimensionen: H\"{o}he, Breite des Dokuments

\parindent0pt

\usepackage{pstricks,pstricks-add}

\definecolor{finlandBlue}{RGB}{0 82 165}


\begin{document}

\thispagestyle{empty}

\begin{pspicture}(0,0)(18,11)
%% Flagge (Verh\"{a}ltnis 18 Breite : 11 H\"{o}he)
%% Breite 5 - 3 - 10 : H\"{o}he 4 - 3 - 4
\psframe[linecolor=white,fillstyle=solid,fillcolor=white](0,0)(18,11)
\pspolygon[linecolor=finlandBlue,fillstyle=solid,fillcolor=finlandBlue](0,4)(5,4)(5,0)(8,0)(8,4)(18,4)(18,7)(8,7)(8,11)(5,11)(5,7)(0,7)
\end{pspicture}
\end{document}
