- My black twisted braid cord necklace is 100% silk, which will give that additional touch of elegance when worn with any of my pendant collection, albeit small or large. The Chinese knot makes it a simple to use and is extremely practical for those who find it difficult to use the regular small jewellery clasps.I offer my 100% silk cord necklace in 5 lengths to cover all your seasonal wardrobe.Size : width 4mm approx.