Vipers can be up to 1.3 meters in size.

The average viper is 1 meter in length and 1.5 kilograms in weight. The head is broad triangular, distinct from the neck, and the snout is short and round. The small scales on the back of the head are ribbed, the nostrils are large, and they are located at the upper end of the snout. The back of the body is brownish-gray, with 3 longitudinal large round spots, the center of each round spot is purple or dark brown, the outer circumference is black, and the outermost has irregular black-brown markings. The abdomen is grayish-white with thick dark brown spots.

The abdomen of the viper is grayish-white with thick dark brown spots scattered on its abdomen. The viper walks in various poses, either in a straight line or in a zigzag, which is determined by the structure of the viper.