A wild caught adult female Morelia amethistina was recently examined and found to be 4900 mm SVL (snout to vent length) with a total length of 5651 mm (18 feet 7 inches). Mass was 24 kg. This is the largest snake ever reliably recorded in Australia and in the absence of verifiable data to lhe contrary, the authors suggest these dimensions represent the maximum size attained by Australian M. amethisiina.