The ChiaoGoo SPIN interchangeable set features the same bamboo needles and nylon cords that you know and love. The needle tips feature a lifeline hole that makes adding a lifeline as simple as knitting across the row. The sets come packaged in an elegant black and white case with a green ribbon. The case is compact (6" x 8" closed) with 29 inner pockets for tips and one outside zippered pocket. 4" SPIN Bamboo Set in Small comes with needle sizes US2 (2.75mm), US3 (3.25mm), US4 (3.5mm), US5 (3.75mm), US6 (4mm), US7 (4.5mm), US8 (5mm) and with cable length 8" (20cm).