You could simply make a small coil , self wrap with additional paracord and tie off. This is merely the way most small quantities of rope cordage is sold. Another option is the rescue belt, an actual using belt of braided paracord. The link is www.slatts.freeserve.co.uk/slatts-knot.htm Minimal length is dictated by what your comfortable carrying. I like to have enough on hand to make a expedient shelter tautline. Thats an easy 12'