How Big Are The Rats In London Sewers?
15.7 inches. The brown rat, brown rat norvegicus, is commonly found in British sewer systems, and only reaches a length of 40 centimeters (15.7 inches) and a maximum weight of 500 grams (1.1 pounds). This relatively ginormous critter is three times longer, and weighs upwards of 11 kilograms (25 pounds). How big are the rats …