C malloc allocated only 8 bytes for int *

C malloc allocated only 8 bytes for int *

I'm trying to create a pointer to a 6 element int in a function to return
it later, so for that purpose I'm using malloc, but it seems to be acting
not as I expected. Here's the code:
int j = 0;
for (;j < 5; j++) {
int * intBig = malloc(j * sizeof(int));
printf("sizeof intBig - %ld\n", sizeof(intBig));
}
Prints the same number 8 bytes as the sizeof(intBig) at each iteration.
Whereas I would expect a series of 4, 8, 12, 16. What am I missing in this
instance?