mudbrick took a very long time to dry and limited brick creation to certain seasons. The fire dried brick allowed the brick production to increase significantly, which created a mass production of bricks in Rome.

Roman brick was almost invariably of a lesser height than modern brick, but was made in a variety of different shapes and sizes. Shapes included square, rectangular, triangular and round, and the largest bricks found have measured over three feet in length. Ancient Roman bricks had a general size of 1½ Roman feet