TWIST cables are made of a flexible, memory-free, nylon coated steel cable with lifeline eyelets at each end.  They have smooth transitions and connect securely to the needle tips. 

Use Small [S] diameter cords with size 2.75 mm (US 2) to 5 mm (US 8) needle tips (ChiaoGoo Tips marked [S]). 

8" length used with 4" tips makes a 16" circular

14" length used with 5" tips makes a 24" circular

22" length used with 5" tips makes a 32" circular

30" length used with 5" tips makes a 40" circular

37" length used with 5" tips makes a 47" circular

50" length used with 5" tips makes a 60" circular