Why Do Different Sizes of Black Hole Exist?

A black hole may be borne from stellar collapse, from a star that is like l 20, 20 times the mass of the sun. If it is in a dense neighborhood whith there are lots of clouds of gas and other stuff, it may then swallow all that gas and grow larger overtime. So that's why black holes come in different sizes, right? Different masses, or and so on. Now, what about the different sizes of infinity? E interesting question, anie. Ye. Black holes could even have formed in the very early universe, the primordial universe. Those are the hypothetical primordial black hols, which may be very small. We have never observed any, but