They define size as volume or weight rather than length, which makes sense, im 180cm long, an elephant is ~4 meters, making it twice as tall. but its weight can

They define size as volume or weight rather than length, which makes sense, im 180cm long, an elephant is ~4 meters, making it twice as tall. but its weight can be 6000kg which is a factor of 100 larger than my measely 60kg. Volume grows at ^3 with increase in cubic length.