What is a serving size? What does it look like? These are questions many of your patients may struggle with. Help make it easier for patients to eat the right amounts at each meal and snack with Your Portion Size Guide. This tear sheet uses everyday objects as points of reference for portion sizes. "1 cup is about the size of a baseball." Now that is easy to visualize. Use Your Portion Size Guide as a handy portion-planning guide for your patients.