What is the diameter of the sun
864,900 miles...about 110 Earths, that is actually considered an average size star. It's still growing too....it grows about the speed of your hair or fingernails!
It has a diameter of about 1,392,684 km, about 109 times that of Earth
An interesting follow up article about the shape of the sun.http://science.nasa.gov/science-news/science-at-nasa/2008/02oct_oblatesun/