It accommodates plates with diameters from 7⅜" to 8⅜". The plate separator allows servers to carry many plates at a time, saving energy and time. The plate separator ensures that the meal arrives in perfect condition and that nothing has been squashed or moved. The plate separator has vents on all four sides so that steam may escape from the dishes and food does not become soggy or overcooked. The top diameter is 7½" and the bottom is 8¾". Polypropylene is dishwasher safe.