Bengal tigers may weigh up to 325 kg (717 lb) and reach a head and body length of 320 cm (130 in).[18] Several scientists indicated that adult male Bengal tigers from Nepal, Bhutan, and Assam, Uttarakhand and West Bengal in northern India (collectively, the tigers of the Terai) consistently attain more than 227 kg (500 lb) of body weight. Seven adult males captured in Chitwan National Park in the early 1970s had an average weight of 235 kg (518 lb) ranging from 200 to 261 kg (441 to 575 lb), and that of the females was 140 kg (310 lb) ranging from 116 to 164 kg (256 to 362 lb).[21] Males from northern India are nearly as large as Siberian tigers with a greatest length of skull of 332 to 376 mm (13.1 to 14.8 in).[22]
Verifiable Sundarban tiger weights are not found in any scientific literature. Forest Department records list weight measurements for these tigers, but none are verifiable and all are guesstimates. There are also reports of head and body lengths, some of which are listed as over 365.7 cm (144.0 in).