The diagram show the proportions of food that you should eat, not the amount. Imagine that the model is your plate. An easy way to think about your portions is to aim for
Half (½ ) your plate to be filled with vegetables or salad.
A quarter (¼) for meat, fish or vegetarian alternatives
A quarter(¼) for starchy foods like cereals, bread, potatoes and rice
More information about the eat well plate can be found on the DH website