I was going to comment that it should be noted all dimensions are in inches, but noticed the "rope length required" box is in inches (also feet)... so all the other dimensions are probably inches too. Easy enough to convert now-a-days, I guess.
One thing that should really be mentioned is the fact that as soon as you drop down to 1.x or 2.x mm cord thicknesses, you need a longer bury... NOT a shorter one. Friction in the bury is the thing that keep your tarp (or whatever) off the ground.
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