Hi everyone, this is a super basic question, but I am getting ready to knit my first hat and the materials call for needles with a 16" long cord (http://knitting.bhookedcrochet.com/easy-knit-hat/). I ordered the needles online and the cord itself is not 16" long, but the needles combined with the cord measure 16". I had also ordered 16" circular needles with a different size needle and it is the same thing- the cord itself is not 16" long but the needles + cord measure 16". So is that how circular needles are supposed to be?? Or did I get the wrong thing?