Zoom's big Ol' Monster of a worm just got bigger. Measuring in at 12-inches in length, the new Zoom Magnum Ol' Monster is beefier around the middle, too. The new magnum offers about an inch and three eighths of circumference, compared to the original one-inch for a much bigger all-around profile. Perfect for catching that kicker fish and targeting those bigger bites, the Zoom Magnum Ol' Monster delivers all of the action and fish attraction of the original - now in a big bass size.