" Cat Breeds - Ragdoll-The Ragdoll is considered one of the world's largest cat breeds, along with the Maine Coon, with an average weight that ranges from 10 to 15 pounds, Russian Blue-The Russian Blue is a naturally occurring breed thought to have originated in Archangel, Russia. Maine Coon-Tipping the scales at up to 20 pounds, the Maine Coon is one of the largest breeds. Despite their muscular and heavy-boned bodies, they are known to be quite agile. Maine Coons sport a thick double-layered coat and have bushy tails. They also have the longest whiskers of any other cat breed."