On this enlarged version, one pixel is roughly one centimeter. Print it at 127 dpi to get a 1:50 scale hardcopy (fits on one ISO A4 or legal format page). Print it at 2.54 dpi to get a full size hardcopy. ;-)
The following UNIX command will create a PostScript file suitable for printing on ISO A4 or legal paper (scale 1:50). Note that this is one command line, even though your browser might break it up into multiple lines for displaying.
pngtopnm flat.png | pnmtops -scale 0.59
-turn -rle -center -width 8.5 -height 11.65 > flat.ps