The Ooldea dunnart, also called Troughton's dunnart after the person who found the species, is an Australian marsupial similar to the hairy-footed dunnart. It is greyish-yellow on its upper body and white on the underside with dark patches on its crown, forehead and in front of the eyes, and a pink thinly furred carrot-shaped tail. Its total length is 11.5–17.3 cm (4.5–6.8 in); its average body length is 5.5–8 cm (2.2–3.1 in) with a tail of 6–9.3 cm (2.4–3.7 in). Its ear length is 14–17 mm (0.55–0.67 in). It weighs between 10 and 18 g.