What is the radius for the super giant star?

The radius of supergiant stars can vary significantly depending on the specific type and stage of the star's evolution. Generally, supergiant stars have radii that range from about 100 to 1,000 times that of the Sun. For instance, a well-known red supergiant like Betelgeuse has an estimated radius around 900 times that of the Sun. These immense sizes contribute to their brightness and distinct appearances in the night sky.