Giant Stars are next in size. They are more than 100 times larger than the sun. Some are called Red Giants or Blue Giants. These stars burn hot and fast. Some live only 100,000 years.
Medium stars are very common.
Nine out of ten stars are medium stars. The sun is a medium star. They can live up to 10 billion years. Dwarf Stars are the smallest stars. They are about half of the size of the earth.