While the external wall was built from bricks, the exterior of the mosque itself and much of the floor inside was made entirely of stone. Three types of stone were used in the construction of the mosque: sand stone, granite, and marble.  The shape of the mosque is a basic rectangle with rounded edges. Each of the four corners of the building have rounded, octagonal towers. Along the roof of the mosque, there are stone gutters to drain rainwater. The exterior walls themselves are divided into two parts (top and bottom), separated by mouldings. The mouldings also serve as a border for decorative panels on the exterior of the mosque. The northern and southern exterior walls each have screened windows. The eastern wall of the mosque contains three blind multifoiled arches. This was a new style of arch created with the construction of the Kusumba Mosque, distinguishing it from other mosques in the region. After the mosque was built, local artisans from the Kusumba village became trained in this style of arch. As a result, there are other similar arches in terracotta temples and mosques that were built after the Kusumba mosque. The central arch of these three was the main entrance to the mosque. This arch is decorated with floral motifs, mostly rosettes. These rosettes were a repeated motif and can be found throughout other parts of the Kusumba Mosque.
