Kaneshin No. 11 Knob Cutter is the standard size at a length of 8″ long. Knob Cutters are used to clean up wounds and to remove branches and wood with a concave “scoop”. These work well for all sizes of bonsai.
For basic usage and tips on how to care for your bonsai tools please visit this link. Bonsai Tools & How to Care for Them