The serving size for vegetables can differ depending on the food, but generally, one serving of vegetables is about ½ cup cooked green or orange vegetables, 1 cup of raw or cooked fruits and vegetables, 3 cups of leafy greens, or ½ cup cooked dried or canned beans, peas, or lentils. The USDA recommends that adults consume 2 to 3 cups of vegetables per day, depending on age, sex, and level of physical activity. The American Heart Association recommends 4-5 servings of fruits and vegetables per day, with one serving of vegetables being ½ cup cooked or 1 cup raw leafy vegetables. The 1-2-3 approach to eating fruits and vegetables suggests getting six servings by eating 1 serving with breakfast, 2 with lunch, and 3 with dinner and snacks.