www.smallplatemovement.com says: “A person tends to over-serve onto larger plates, and because people consume an average of 92% of what they serve themselves, larger plates lead to larger food intake. A two inch difference in plate diameter — from 12" to 10" plates — would result in 22% fewer calories being served, yet it is not drastic enough to trigger a counteracting response. If a typical dinner has 800 calories, a smaller plate would lead to a weight loss of around 18 pounds per year for an average size adult.”