Sinezona brevis is a species of small sea snail, a marine gastropod mollusc in the family Scissurellidae.

The sculpture shows distant longitudinal lamellate ribs that cross the whorl from the suture to the umbilicus.

Their interstices contain raised spiral threads, which grow coarser on approaching the umbilicus.

The inner lip spreads as a distinct callosity over the body, and sometimes seals the umbilicus partly or wholly up.

The fasciole is extremity short, terminating half a whorl behind the aperture.