Final answer:
The typical size of a granule on the Sun's photosphere is between 700 to 1000 kilometers in diameter.
Step-by-step explanation:
The size of a typical granule or convection cell seen in the photosphere is typically between 700 to 1000 kilometers in diameter. These granules, which make up the granulation pattern observed on the Sun's surface, appear as bright areas due to columns of hotter gases rising and then cooling and sinking into the darker, cooler regions. The photosphere has a mottled appearance similar to grains of rice on a tablecloth or boiling oatmeal due to this process.