Fits standard 1/4 lb. butter bars/sticks (Not for California, Oregon, or Washington State) if you live in one of these 3 states order the large Multi-Size Butter Cutter. The one-click butter cutter holds and slices butter into pats with just a squeeze. Easily loads a complete stick of hard butter. Slices can be cut and dispensed with one or two hands. Measures out butter with 4 slices per tablespoon. No mess-no fuss. Keep hands and butter clean. Stores in the refrigerator and is easily cleaned in the dishwasher or in warm water. Designed for use with 1/4 lb butter bars of butter. If you live in California, Oregon, or Washington State, order the Multi-Size Butter Cutter.