My Grandma had a Maine coon cat- Some of the largest cats in the world are Maine coon cats- Hers wasn’t a monster, but was pretty big cat-
Ours aren’t huge, either, but still dwarf normal cats. The older brother weighs around 17-18 pounds, and the younger one weighs about 14-15 pounds. When the big one lays down, and does his “Superman” pose with arms and tail straight out, he measures almost 48 inches long.
Everyone that meets them comments that they’re the biggest cats they’ve ever seen.