The hind pug consists of four digits three clawed and one soft and fleshy. On good substratum, the pugmark may even show the scute impressions from which an otter pugmark can be separated out. Otter will not have the scutes but have hairs. A pugmark selected for size interpretation must show the distance between the heel and the point up to the beginning of the claws. The length of the pug is about one twelfth to one fourteenth of the total body length in mugger.
Gharial pugs are relatively small.
The use of hind pugmark length for size estimation is more reliable in palustris than the use of tail scute length. These show characteristic curved lines running parallel to each other. The space between two lines indicates the size of a ventral tail scute. The relationship has not been established in mugger and saltwater crocodiles. It is, however, approximately 65.