Why is int size 4?

Question

It should be 2 as we take size of signed and unsigned integers 2 whereas long integers have size 4... (Correct me if I'm wrong)

Answer 1

Take a look at that discussion:

https://stackoverflow.com/questions/11438794/is-the-size-of-c-int-2-bytes-or-4-bytes

Answer 2

Integer size depends on their max and minimum values.
numbers have typically 2**8**n different values.