This KNITPRO Jumbo Birch fixed circular needle is made for super-bulky knitting where extra-large tips help you build big stitches quickly. It is 80cm (about 31 in) long overall with 25 mm tips and a permanently attached cord to work large rounds and flat panels without swapping parts. Choose jumbo needles like this when your pattern calls for very thick yarns, and you want an easy way to move a high stitch count across the cord.