Cut 20 25cm (97/ lengths of yarn. To make sure they’re all the same length, wind the yarn around a 12cm (4 ") wide piece of cardboard and then cut at one end.
Wrap the bundle of yarn behind the four middle warp threads of the weave so there's an equal amount of yarn on either side.
Pull the centre of the bundle through the middle of the warp threads, then pass the two cut ends through the loop created. As you pull the cut ends, the loop will tighten to form the rya knot. Repeat Steps 1-3 as required for your weaving project, then trim the yarn ends to neaten.