Well, that depends on how detailed you want your VTuber model to be. Generally speaking, the more polygons a model has, the more detailed it is. However, too many polygons can also slow down your computer and make your VTubing experience less enjoyable. The golden balance rests between detail and smooth sailing. As a general rule, a splendid VTuber model usually struts around with 20,000 to 50,000 polygons. Of course, this count sways with the complexity of your design.