Using this demo...
And a curtain I already had laying around, I was able to make 4 skins, with no hemming needed, since the ends were already done.
The only measurement I didn't follow was total length, since these skins were for my tarp, it needed 110 inches of length, my skins total are 160, just in case I feel like rigging my tarp as a diamond.
Then when I finished I used two chairs as my 'trees' with my dad and little brother sitting in them, to setup my continuous Ridgeline using this image from a fellow here on the boards uploadfromtaptalk1357693409770.jpg
I really like the ease of setup and take down, and oh my, skins on the tarp just blow folding AWAY!