It's about 1 foot for every in an that leaves a lil extra so your not short. King cobra you do your fractions cause it depends how tight you make it. But normal is 1/4 more than what you used originally on the cobra. Great knots by the way. Tension was even on them and correctly spaced. Knots will move around but tension to me is so important. That how I tell if the item is of good quality.