Rhodometra sacraria has a wingspan reaching 22–28 mm, while the length of the forewings is 12–14 mm. These moths are easily distinguishable from the mahogany or pink stripe, located on yellowish or cream background, crossing diagonally the dorsal sides of the upperwings up to the apex. The dorsal sides of the hind wings are whitish. The intensity and the extent of the pink pigmentation is rather variable, depending on the seasonal temperature in the development of the pupae. Usually the moths rest with a tent-like posture on twigs and herbs, with the wings parallel to each other. They fly from April to October in the northern hemisphere. They are nocturnal and attracted to light.
This species inhabits meadows, forest clearing, paths, gardens and urban environments. It is found throughout Europe, Africa and large parts of Asia.