I WOULD BE STARVING IF I WERE TO FOLLOW THIS HAND GUIDE TO PORTION CONTROL

I am tall and lanky. Which probably means that my hand is too small to measure portions for me. Also, doctors have told me my feet are too small for my proportion that is why I have weak ankles. So, what is this portion control about? If I were to follow this control, I would be banned on the catwalk in 2016. Aren't they banning over skinny people now?

Surely this is for a meal. But isn't that way too little?