PortionMateTM color-coded rings measure perfect carb and protein portions directly onto plate or into bowl - making weight management easy. Small enough to carry in purse or tote bag, the set of 6 plastic rings range from 1 to 8 ounces, nesting together at just 4 1/2"dia. Working with any diet plan, PortionMateTM follows recommendations of the American Diabetes Association and Academy of Nutrition and Dietetics. Set includes NEW PortionMate Nutrition and Meal Planning Guide, with information about carbohydrates, proteins, and fats. Top-rack dishwasher safe. Color-coded rings measure perfect portions directly onto plate or into bowl. PortionMate is used at: Joslin Clinic Arkansas Childrens Hospital NYU Langone Medical Center Oneida Community Health Center New Mexico State University University Hospital Case Medical Center Sanford Health and moreAshley Koff approved