[1] The typical shell-length of Cryptoplax iredalei can reach about 36 millimetres (1.4 in).

[2] Body is narrow and flattened, oval shaped, with 8 shell sections or valves.

The basic color is brown to red-brown, sometimes with light and dark bands.

[3] This species is endemic to southeastern and southwestern Australia.

These chitons can be found subtidally under rocks and stones.