Celtic button knot

A Celtic button knot is a stopper knot on a single rope that results in a spherical decorative knot with hair braid / basket weave pattern. It is essentially a single strand Turk's Head Knot that is structured such a way that it is effectively tied around the rope itself, creating a stopper. It typically is used as a button, or as a knot securing the end of the rope from fraying.

1. step 1: Make two consecutive overhand loops, place the last partially over the first
2. step 2: weave left end from right horizontally through the loops; over, under, over, under
3. step 3: weave left end again from left: over itself, under, under, over and up through the central hole
4. step 4: tighten evenly