Once you start using this Butter Keeper, you will not want to use hard butter again. Holding up to 1 stick of butter, the water in the base seals out air to keep the butter soft, sweet and spreadable for up to 30 days - without refrigeration. Simply pour approximately 1/2" of water in the basin, fill the top of the butter keeper with butter, turn it upside down so the water is covering the top of the butter and it keeps it soft and spreadable. Your butter stays fresh. (Water should be changed every 2-3 days). It is about 4 1/2" x 3 1/2". Thanks for stopping by Fired to cone 04.