Tuff Cord Black #3

Euro Tool's Tuff Cord boasts itself as the best quality American-made beading cord available. And it is pretty great! These synthetic nylon fibers are super strong: they're made of three strands of long fiber not just two. Will not stretch or stain and it resists fraying and shredding. Tuff Cord can be used without a needle! (YAY!)

Tuff Cord #3 seems to be the all-around winner, for all your beading needs, at just under a half millimeter diameter (approx. 0.41 mm).