Portion sizes significantly affect weight management by influencing how much food individuals consume. Larger portion sizes can lead to increased calorie intake, contributing to weight gain over time, while smaller portions can help control hunger and reduce overall caloric consumption. Research shows that people tend to eat more when served larger portions, even if they are not hungry. Practicing mindful eating, paying attention to hunger cues, and using smaller plates can aid in keeping portion sizes in check, promoting better dietary habits and supporting efforts to maintain a healthy weight and prevent obesity.