How big do Molossus of Epirus dogs get? A How big do Molossus of Epirus dogs get? Molossus of Epirus dogs can grow up to 80-90 cm (31-35 inches) in height and weigh up to 60-70 kg (132-154 pounds). Just Us Dogs2023-04-26T11:19:36+00:00 Share This Post FacebookTwitterLinkedInPinterest