Hemp is perfect for marcrame or other knotting activities. Its roughness holds knots well and also adds a very natural look to your designs. We recommend using a bit of adhesive such as GS Hypo Cement on your beginning and end knots—just in case! ☺ We carry the two most common weights: 10lb (approx 0.5mm) and 20lb (approx 1mm). The weights refer to the rope’s test strength (how much weight it can bear).