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.
Type of knot
Tying
There are 4 main steps to tying the Celtic knot:
two consecutive overhand loops, the last one placed partially over the first forming two petals of a four petal flower
left end woven from right horizontally through the loops; over, under, over, under forming the third petal
left end woven again from left: over the edge, under, under, over and up through the central hole finishing the four petal flower
optional: pushing the end again into the knot following the main part consistently on the inside. This may be repeated to give volume to the knot
tightening evenly to close the petals of the flower forming a sphere around the main part
Step one of tying a Celtic Button knot is a simple loop
Step two of tying a Celtic Button knot is another loop
Step three of tying a Celtic Button knot end woven into loops
Step four: the end goes over the edge line, and under until the middle
Optional second pass-step one: follow the first pass on the inside
Optional second pass-step two: follow the first pass on the inside
Optional second pass-final step of tying a Celtic Button knot done
Optional third pass-final step of tying a Celtic Button knot done
Tightening step of tying a 3 pass Celtic Button knot
A 3 pass Celtic Button knot as seat of a rope swing
Celtic Button knot on the bight therefore double, flat, with loop
Celtic Button knot on the bight therefore double, tightened, with loop