Kunzea affinis is a shrub which grows to a height of up to and a width of about . It usually has a few erect branched which have many short but intricate side branches and which are hairy when young. The leaf stalk is less than long and the leaf blade is linear, long and less than wide. The leaves are erect or pressed against the stem and have long hairs, mainly along their margins. The flowers are arranged in groups of two to five flowers on the ends of the branches which continue to grow after flowering. The flowers are surrounded by woolly
bracts and
bracteoles about long. The five
sepals are broad egg-shaped,
glabrous and long. The five
petals are oval to spoon-shaped, long and rose-pink. There are about 20 to 25 rose-pink
stamens long with bright yellow
anthers on the end. Flowering occurs from August to October and is followed by fruit which are small
capsules which release many small seeds when ripe. ==Taxonomy and naming==