How to get fine control of circle size for circle select cursor?

the step size o the MMB in circle select mode is huge for me, is there a setting to make the control more fine grain? thx

Unfortanly there is no setting in blender, you must change your os setting for wheel speed.

thanks, but are you saying must change it for all windows or can change just for blender?

Yes, you must change it for all windows.

By using Circle Select from the toolbar, you can define precisely the radius, but it’s not very convenient to quickly change it.