I found these interesting statistics in a newsletter from the American Institute for Cancer Research.
This shows the percentage increase in size of today's ready-made food items over their size in 1982.
White bread is the same size.
Beer- 28% larger
Soda-35 % larger
Hamburger, chain restaurant- 112%
Bagel, independent store-195%
Chocolate Chip Cookie-700%
That means that chocolate chip cookies are 7x what they were in 1982. I know I'm much bigger than I was in 1982!