how big is maine
Rating Newest Oldest. Best Answer: Maine Coons are very large and energetic cats, sometimes weighing up to around 25 pounds; the average weight is 13-20 pounds for adult males. Male Maine Coons may grow to a length in excess of 40 inches. Maine Coons are very large and energetic cats, sometimes weighing up to around 11-12 kilograms (25 pounds); the average weight is 6 to 9 kilograms (13-20 pounds) for adult males and less (7-11 pounds) for females.