Help Hanging Help

[squareminus1]

Hi all,
Quick question, i bought a 20mm cotton rope? Cause i just though 20mm that is thick that should work. A quick google says cpttom rope is not that strong but there is limited resources on how strong it is.
I am ~80 kg do you think a 20 mm cottom rope will hold me?

 

[Worndown]

Tie it to something solid, grab it with both hands and see if it holds you. Wiggle around a little to simulate any post pass-out movement.