These needles have a cuboid shape in the body of the needle that gradually gives way to perfectly tapered birch wood points. The ergonomic shape is comfortable to hold, lessens the need to grip tightly, and yields uniform stitches with less hand fatigue. The laminated wood is rich in appearance, yet it is also lightweight, strong, flexible, and warm to the touch. Needle size is measured diagonally and fits into standard needle sizer just like round needles.

The square shape makes them ideal for those with arthritis.