Editorial Review ChiaoGoo TWIST Shorties Combo Packs Size: US-3 (3.25 mm) Each TWIST Shortie Combo pack contains: One 2" (5 cm) set of tips. One 3" (8 cm) set of tips. Two MINI Twist red cables allowing knitters to make 9" (23 cm) - 12" (31 cm) circulars. The tips are solid, surgical stainless steel and have a tightening hole. Note: This new system of TWIST interchangeables is slightly different where tip sizes up to US-3 (3.25mm) have a MINI diameter join. Tip sizes 4 (3.5mm) and larger have the small [S] diameter join. Note: ChiaoGoo Shortie tip sizes US-000 through US-3 will also attach to the ChiaoGoo Mini Twist cables.