A typical serving size of fruit is equal to one medium-sized apple or a piece of fruit about the size of a baseball, according to Heart.org. The serving size for a vegetable is about one cup for raw leafy vegetables.
One serving of frozen or canned fruits or vegetables is equal to one-half of a cup. The serving size of dried fruit, such as raisins, is one-quarter of a cup. The recommended serving size for fruit or vegetable juice is one-half of a cup. Heart.org recommends that individuals get four to five servings of both fruits and vegetables per day.