The queen has a similar appearance to the workers, but its middle body is more irregular and coarser.[1] The queen is also the largest, measuring 14 to 16 millimetres (0.55 to 0.63 in) in length.[8] Males are either smaller or around the same size as workers, measuring 11 to 12 millimetres (0.43 to 0.47 in).[8] Males also have much smaller triangular mandibles than workers and queens.