Do stars with the same color have the same size?

No, stars with the same color do not necessarily have the same size. Color in stars is primarily determined by their temperature, with hotter stars appearing blue and cooler stars appearing red. However, stars of the same temperature can vary significantly in size, as they may belong to different classes, such as dwarfs, giants, or supergiants. Thus, while color can indicate temperature, it does not provide a definitive measure of a star's size.