The male Curetis santana have bright orange upper wings with black margins, in females the color is paler and the black edges are wider. The underside of the wings are silvery white with scattered black spots. On the forewing there is a post-discal band that extends from the ribs near the crest to the dorsum. The legs are reddish orange in color.
Larva: larvae of Curetis santana are yellowish to reddish brown, but at the 4th and 5th instars the color changes to pale green. Its body is covered with short setae and on the 8th abdominal segment there is a pair of long black cylindrical horns, when the caterpillar is disturbed, tentacles will come out of the horn.
Pupa: The pupa Curetis santana is jade green with a number of white spots on its surface, half spherical in shape and flat under surface.