Knitter's Pride Cubics Fixed Circular Needles have a cuboid shape in the body of the needle that gradually gives way to perfectly tapered birch wood needle points. The ergonomic shape is comfortable to hold, lessens the need to grip tightly, and yields uniform stitch formation. The densified, laminated wood is rich in appearance, yet it is also lightweight, strong, flexible, and warm to the touch. Needle size is measured diagonally and these needles fits into standard needle sizers just like round needles. These needles are also available in 24" and 40" lengths.