\documentclass{article}
\usepackage{fullpage,nopageno}
\usepackage{tikz}

% This was created by Chris Staecker
% You are free to do whatever you want with it.

\tikzset{every picture/.style={line width=.1pt}}

\begin{document}
\newcommand{\unit}{3.82mm}

\[
\begin{tikzpicture}
\clip(0,0) rectangle (40*\unit,50*\unit); 
\draw(0,0) rectangle (40*\unit,55*\unit); 
\draw[step=\unit](0,0) grid (40*\unit,55*\unit); 
\draw[step=\unit, rotate around={30:(1,1)}](-\unit,-30*\unit) grid (80*\unit,55*\unit); 
\draw[step=\unit, rotate around={-30:(5,6)}](-40.2*\unit,-30*\unit) grid (80*\unit,75*\unit); 
\end{tikzpicture}
\]

Millimeter scale Steinhaus longimeter. Number of crossings is the length in mm.

\renewcommand{\unit}{.382in}

\[
\begin{tikzpicture}
\clip(0,0) rectangle (8*\unit,5*\unit); 
\draw(0,0) rectangle (40*\unit,55*\unit); 
\draw[step=\unit](0,0) grid (40*\unit,55*\unit); 
\draw[step=\unit, rotate around={30:(1,1)}](-.33*\unit,-30*\unit) grid (80*\unit,55*\unit); 
\draw[step=\unit, rotate around={-30:(5,6)}](-40.2*\unit,-30*\unit) grid (80*\unit,75*\unit); 
\end{tikzpicture}
\]
Tenth-inch scale Steinhaus longimeter. Number of crossings divided by 10 is the length in inches.


\end{document}