Height of Washer controls the height of the washer elements to be generated around each hole. By default, the height is set to the Defeature Size .
You should ensure that the height of the washer is set to a value between the target minimum element size in the model and the Element Size (the nominal uniform element size expected in the overall model).
Note: The mesher attempts to respect the minimum size and Element Size when the mesh is generated. However, you may notice variations in the final mesh due to local feature sizes, transition areas, or other geometric anomalies.