The classic cord used for traditional knotting and floats, Griffin has been making silk-on-cards in Germany since 1866. Starting with 100% natural silk, they twist the fiber three times to create their distinctive rope thread. Each card is 2 meters (approximately 79 inches) with a twisted stainless steel needle attached. Matching bead holes to knot size is more of an art than a science. We suggest buying all three sizes and having the flexibility to experiment...often, it’s trial and error! Since silk can stretch, we recommend pre-stretching.