What size is a blowfish?

The sizes of blowfish vary greatly depending on the species. The smallest species, the Indian pygmy blowfish, grows to a maximum length of about 2.5 centimetres (1 inch), while the largest species, the giant blowfish, can grow to a maximum length of about 122 centimetres (4 feet). The average size of a blowfish is around 30 centimetres (12 inches).