Why This Works
People base their portion size on how it looks relative to their plate, bowl, cup, and utensils. And so the bigger the dinnerware, the bigger the portions. Additionally, most people “clean their plates,” mindlessly eating until no food is left, rather than until they are physically full. When people use smaller dinnerware, their portions are also smaller, so “cleaning your plate” actually results in eating less food than when people use larger dinnerware.
When This Works Best
Even nutrition experts, who should be aware of portion control and mindless eating, respond to this subtle intervention. Therefore, this intervention likely works for nearly anyone who wants to eat less.
When people use smaller dinnerware (plates, bowls, cutlery, etc.), they eat less…
https://sparq.stanford.edu/solutions/use-smaller-plates-smaller-waist
North Carolina Keto Girl 
When I was having my Lap Band surgery I read that eating off smaller plates was better for you. I also read that the color red was the best for portions. But being the fussy person I am, I never found any that met the Queen’s approval. So either Marshall’s or TJ Maxx I bought a few small hand blown glass plates and some small bowls, also. They were $1.99 each. Not a large investment for eating in class all the time. They are clear glass with blue running threw them. I love them. I also use a salad fork for all in my in house meals. I am weird. Invest in fun dinner plates and bowls, your new healthier body deserves the very best.
Well said eye candy. If you eat, eat on good plates. Light a candle, use good silverware. Make it important. Eating is a good thing.