the size of the star

How big can the stars in the universe be?
while dwarf stars are only about as big as a planet, other supergiant stars may be 1,400 times larger than the sun. for example, super-giant vy canis majoris has a diameter of up to 2 billion km.
Which star lives the longest, brightest, biggest, ... in the universe?
stars are an integral part of the universe, they are also divided into countless types. there are many stars with outstanding features, creating records that make us astounded.