Did you know that dinner plates, up until the late 1960′s used to be only 9 inches in diameter? Since then, they have kept getting bigger until today the average dinner plate is 12 inches wide. And so, when we fill our plates we are taking ever-larger portions, and when we eat everything on our plates like good boys and girls, we get ever fatter. Here is a discussion of the phenomenon, which also reviews the book The 9-Inch ‘Diet’
by A. M. Bogusky, who argues that we can lose weight by simply psyching ourselves out with smaller plates.