Size of Stars

Starting below from the smallest to the largest that we know of right now; and in the years to come, we will discover many more sizes, from very small to very large, and everything in between.
The star sizes starting by the smallest by type are:
White Dwarf
Brown Dwarf
Red Dwarf
Yellow Dwarf - our sun
Blue Giant
Orange Giant
Red Giant
Blue Supergiant
Blue Hypergiant
Red Supergiant
Red Hypergiant
The last 7 star sizes are the larger type stars. These stars are called ‘Large Stars’
White Dwarf
White dwarfs are the smallest type stars, with a similar size to earth, and with extreme mass. The mass of these stars can be equal to that of the sun.
Brown Dwarf
Brown dwarfs are strange altogether. Not officially a star and not officially a planet, but somewhere in between based the sizes of the stars. Brown dwarfs are around the same size of a large planet in the solar system.
Red Dwarf
Red dwarfs are one of the most common stars in the Milky Way galaxy. Larger than white and brown dwarfs but smaller than yellow dwarfs, like our sun. The closest star to earth, called Proxima Centauri is a red dwarf.

Yellow Dwarf
Yellow dwarfs are main sequence stars which means that they are in the stable range of their life cycle. Our sun is a yellow dwarf, so yellow dwarfs are similar in size to our sun. Yellow dwarfs are a size between red dwarfs and blue giants.

Blue Giant
Blue giants are the smallest of the 7 larger type stars, and larger than yellow dwarfs. Blue giants are larger and hot. Blue giants are also very hot, and are quite rare compared to other starts.

Orange Giant
Orange giants are stars that are sized between blue and red giants. The star called Pollux is an orange giant, with the orange colour indicating that the surface temperature of the star is lower than that of a main-sequence star.
Red Giant
Red giants are larger luminous stars that have low mass. Red giants are in a late phase of the star cycle and have burned most on the hydrogen at the core.


Blue Supergiant
Blue supergiant stars are in between the size of red giants and blue hypergiants. They are very luminous and very hot. They become blue supers through radiation pressure, convection and the large burning of hydrogen. These will eventually become red supergiants over time.

Red Supergiant
Red supergiants are a size in between red hypergaints and blue hypergiants. These stars become red supers when high mass stars use most of the hydrogen at the core. They become supergiants through their life cycle. The well-known star ‘Betelgeuse’ is a red supergiant.