The reticulated python is generally about 8-9 meters, and the longest can reach more than 12 meters.

The reticulated python has a very strong winding force and a slender body, making it the longest python in the world. The upper lip scales have sunken lip sockets. There are three black fine lines on the head, one in the middle of the head, the other two extending from the eyes to the corners of the mouth, the back of the body is gray-brown or yellow-brown, with complex diamond-shaped dark-brown and yellow or light gray reticulated markings , hence its name.