What is a small rat like marsupial?

A wallaby, a rock-wallaby, a nail-tail wallaby, a wallaroo, a dorcopsis wallaby, a tree-kangaroo, a Quokka, a Swamp Wallaby, a pademelon, and a hare-wallaby are all smaller relatives of the kangaroo.

However, the only ones to fit the description of "small" are the quokka, pademelon, potoroo and the bettong. The smallest of all the kangaroo family is the musky rat-kangaroo, which is an average of 23 cm in length.