How big does the cat breed Maine Koon grow? Would shaving him help with shedding?

Google search produced the following description... The Maine Koon is the largest domesticated cat breed. It has a distinctive physical appearance and valuable hunting skills. It is one of the oldest natural breeds in North America, specifically native to the state of Maine, where it is the official state cat. Wikipedia: Length: 1 m (Adult, Nose to tail) Scientific name: Felis catus Common nicknames: Gentle giants Mass: Male: 5.9 - 8.2 kg (Adult), Female: 3.6 - 5.4 kg (Adult)
Did you know: Maine Koons are built to survive cold winter temperatures.
I don't approve of shaving a cat except in the warmest climates. I suggest you increase grooming frequency. Lots of dogs actually enjoy being vacuumed but most cats run though the Maine Koon is considered a fairly laid back sort of cat it might be worth trying... Sorry about the spelling - this site won't allow the correct name of the breed.