Bolt Socks | Berroco Bolt Socks are ribbed with an easy central cable and twisted stitch accents. One size Size To fit women’s average foot. Materials 3 Hanks Sundae (100 grs), #8720 Rocket. Two 16” length circular knitting needles, size 13 (9.00 mm) OR SIZE TO OBTAIN GAUGE Cable needle (cn) St markers Tapestry needle