This viper grows to a maximum total length (body + tail) of 95 cm (37.5 in), although individuals usually measure less than 85 cm (33.5 in). Maximum length also depends on locality,[vague] with northern forms distinctly larger than southern ones. The average total length is 50–70 cm (19.5–27.5 in) with reports of specimens over 1 m (39 in) in total length. Females are usually larger and more heavily[specify] built, although the largest specimens on record are males.