Reply by Ron Aylor

I’ve achieved this many time in MSPaint. First you have to establish a scale of sorts. I use the largest square paint bush to create the scale. Each square will represent an inch or fraction of an inch. Use this scale to create a grid and draw your figure.
 

 
Now comes the hard part you will have to print a few times until the initial scale you established prints out full size. your figure will most likely be drawn over several pages … simply match/tape the pages together and cut out your figure.
 
Sorry for the tiny guitar, but I think you get the drift. Good Luck!