Average diameter of virus is 8-300 nm. Typically plant virus are 17-2000 nm and animal virus 20-350 nm. The smallest plant virus is Satellite Tobacco Necrosis Virus, 8-17 nm. The largest plant virus is Citrus tristeza virus, which is 2000×12 nm. The smallest animal virus is the foot and mouth disease virus of cattle, which is 8-12 nm. The largest animal virus is the smallpox virus, which is 350×250×100 nm. Rhinovirus 10 nm, Polio virus 12 nm, Cauliflower mosaic virus 50 nm, Influenza virus 100 nm, Herpes virus 100-150 nm, Mumps virus 150-250 nm, Vaccinia and variola virus 280-300 nm, Bovine distemper virus 300 nm. over nm, tobacco mosaic virus 300×18 nm and potato X virus 500×10nm. Bit yellow virus 1250×40 nm.
