A healthy portion size is typically defined as the amount of food that aligns with nutritional guidelines to support a balanced diet without overeating. It varies depending on the type of food and individual dietary needs. General recommendations suggest filling half the plate with fruits and vegetables, one-quarter with lean proteins, and one-quarter with whole grains. Using smaller plates and measuring portions can help individuals manage serving sizes effectively. Mindful eating practices, such as paying attention to hunger cues, can also guide appropriate portion sizes, avoiding excessive intake while promoting overall well-being.