Quiz: How much does size matter?
Check out this quiz on modern portion sizes vs. portion sizes of the past.
It points out that twenty years ago the average bagel was about half the size and half the number of calories as today's bagel. The news gets worse from there.
I've noticed this a lot since we started struggling to lose this weight. You're almost never given one portion size of anything -- and if you are, it seems very small in this giant-food culture we've built.