It really all depends on who you are, what you're trying to acheive, what you're eating, which meal you're eating, how active you are, etc. There's no set answer.
A body-builder is going to eat far more than the average person. Someone with a physical job will eat more than someone with a sedentary job. I don't eat big meals but I eat 5 times a day, plus snacks.
What are you trying to achieve?