The best nozzle size for an Ender 3/Professional/V2 3D printer is 0.4mm for high quality models at a 0.12mm layer peak, or quicker prints at a 0.28mm layer peak. For miniatures, a 0.2mm nozzle is nice for quality to get a 0.05mm layer peak for top-res 3D printers. You may truly use a 0.05mm layer top with a inventory 0.4mm Ender three nozzle surprisingly, as shown in the video below. You may watch the YouTube video as properly for higher clarity of the footstep-by-step process to Supercede Ende...