Circular Needle with a Trick "Socks Wonder" The 25 cm long circular knitting needle has its original addi gold cord between two needle tips of different lengths. One needle tip is 45 mm long and the other is 70 mm long. The idea was from a clever idea provided by a customer. The knitting of socks in a circular direction is made much easier by the mini needle, as the longer tip is easier to take hold of. Give it a try! You will be surprised how easy it is to work with these.