\documentclass[11pt]{article}
\usepackage{tikz}
\usepackage{siunitx}
\usepackage[T1]{fontenc}
\usepackage{boxdims}
\addtolength{\textwidth}{2cm}
\addtolength{\textheight}{3cm}
\setlength{\oddsidemargin}{0pt}
\setlength{\evensidemargin}{0pt}
\setlength{\hoffset}{-0.5in}
\pagestyle{empty}
\thispagestyle{empty}
\begin{document}
  \noindent\vspace{2ex}\input{test.tex}
\end{document}