Single Knot
The single knot, also known as 'hitostu-musubi' (つ結び) or 'overhand knot,' is the simplest among stopper knots.
The single knot is tied with one end around its own standing part to prevent the end of a rope (or fabric) from unraveling. Especially when used alone, the single knot is very secure and should be used if the knot is intended to be permanent.
How to Tie the Single Knot
Hold just one end of the furoshiki.
Form a loop.
Pass the end through this loop.
Tighten to complete the knot.