Kunzea aristulata is an erect, spreading shrub which grows to a height of up to with its branches silky hairy when young. The leaves are elliptic to broad elliptic, long, about wide and covered with soft hairs when young. The leaves often abruptly taper to a sharp point. Only the midvein of the leaf is prominent. The flowers are usually arranged in clusters of between five and fifteen flowers on the ends of the branches. The floral cup is about long and glabrous. The sepal lobes are broadly triangular, long and pointed. The petals are white to cream-coloured, more or less round to egg-shaped, about long and there are about fifty stamens which are long. Flowering occurs in October and November and the fruit are urn-shaped capsules which are long and about wide.
