In what has been called the "world's largest cat," Maine Coons are huge even by big cat standards. The average adult Maine Coon is 8-10 pounds and 14 inches long from nose to tail, with a 16-18 inch tail. Heshe is just shy of 2 feet in total length and weight and can easily be carried over your shoulder.br br Maine Coon cats are one of the most popular breeds in America. These intelligent and playful animals have been around for centuries and have influenced many other breeds of cats today. Not only do these cats make great companions, but they also help to keep rodents and insects under control.