Size AA C-lon beading thread is perfect for using with the smaller size 15 or 11 seed beads. Industry size Tex 35, each bobbin of nylon thread measures 1/4" x 3/4" and has approximately 75 yards (68m) per bobbin. CLBAA is approximately .09mm in diameter with a breaking strength of 4 lbs. Twelve bobbin set, two of each color, 'Treebark Mix'. Made in the USA.