Addi Turbos are a marriage of brilliant engineering with every knitter’s dream. Addi’s breakthrough design features a hollow plastic core that offers strength and very light weight that provides the smoothest ride possible for your stitches. No wonder we all love addi’s so much!Click on the tab that shows the length you want, then order the size(s) you need. Per industry standard, all circular knitting needles are measured from tip to tip. For example, a 32″ circular needle is 32 inches from one needle tip to the other.