A: Where do you live?
B: I live in Pasadena.
A: Where is Pasadena?
B: It's in California.
A: Is it in northern California?
B: No. It's in southern California.
A: Is Pasadena a big city?
B: It's pretty big.
A: How big is "pretty big"?
B: It has about 140,000 people.
A: How big is Los Angeles?
B: It has about 3 million people.