A synthetic alternative to traditional silk cord, Griffin nylon bead cord is just as strong and won't stretch or droop over time. FusionBeads.com has it in four sizes, including size 8, and lots of bright, saturated colors. Griffin Cord is the most popular choice when tying knots between beads in the traditional pearl-knotted style or any design of which a visible cord is an integral part. Griffin Nylon Bead Cord in size 8 is approximately .80mm (.032 in.) in diameter.