We love, love, love Tuff Cord by Eurotool®. It's super easy to use without a needle and it is adored by macramé afficionadas worldwide. We're carrying it in the two most popular sizes, 1 and 3 (plus black and white in 0, 5 and 6). #1 is great for knotting fine gems and smaller pearls and for extra-fine macramé work. It will give you a very delicate knot, even using larger beads. #3 is your all-around winner for medium knots and cooperates with the holes of most semi-precious stones, tribal, glass, larger freshwater pearls, crystals and some gems. For even larger knots, we carry Superlon-18 by Beadsmith®. All will give you a great knot and a lifetime of wear. We are asked all the time, "How does Tuff compare with C-Lon?" Tuff cord is stiffer, less thread-like, but apples to apples, Tuff #1 is similar in size to Micro C-Lon and Tuff #3 is close to C-Lon in thickness. The C-Lon cords also come in more colors, a tempting option. Dye lots can vary and so can the color representation via your computer screen. We do our very best to accurately match the true colors of the cords.