What is the right size cage for a hampster?

Question
My hamster has a 2 story cage. Do you think it is big enough? She is a Long Haired teddy bear Hamster. Please HELP!!!!

Answer
As long as the cage you have doesn't contain plastic tubes because the plastic tubed cages found in most pet stores aren't wide enough for a hamster that is going to be big like your hamster. The all plastic cages with tubes and stuff are for dwarf hamsters and gerbils. You cage should be big enough for your hamster. Generally a hamster your size should be in a cage that about the size of a 10gal tank.