Abstract: A sizer includes a frame defining a sizing chamber and a roll assembly positioned at least partially in the sizing chamber and supported for rotation relative to the frame. The roll assembly includes a shaft defining a longitudinal axis and configured to be driven by a motor about the longitudinal axis, an adaptor coupled to the shaft for rotation with the shaft, a cutting section removably coupled to the adaptor, and at least one insert positioned between the cutting section and the adaptor. The cutting section includes at least one cutting element positioned at a radial distance from the longitudinal axis. The at least one insert is removably coupled between the cutting section and the adaptor to modify the radial distance of the cutting element.