The maximum weight of the inch white snake is about 2kg.

Cunbai snake is a venomous snake with white and black rings on its back, narrow white ring, slender tail, body length of 1,000-1,800mm, and front groove teeth.

The back of the inch white snake is black or blue-black, with 30-50 white or breast Yellow narrow stripes; ventral surface dirty white. The head and back are dark brown, and the larvae have light-colored inverted V-shaped spots on the back of the pillow. The dorsal ridge is high, triangular in cross-section, and the end of the tail is pointed. The head is oval, indistinguishable from the neck, with typical 9 large scales on the dorsum, no cheek scales, and a row of ridge scales in the middle of the back that expands into a hexagonal shape; the lower caudal scales are single row.