Despite its scientific name (viridis is Latin for green) this insect ranges in color from bright green to dull brown. Females can reach 10 cm (3.9 in) in length. Sexual dimorphism is typical of mantises; the male is much smaller. Females may also be distinguished from males as they have a six-segmented abdomen compared to an eight-segmented abdomen of the male.
As adults, both sexes have a distinctive white spot on their wings. They have a yellowish color on their inner fore leg distinguishable from the black eyespot and white dots of the European mantis Mantis religiosa with which it shares some range.