For two people, a fridge with a capacity of 14 to 18 cubic feet should suffice, depending on how often you cook and store food. A family of four should look for a fridge that has between 16 and 24 cubic feet of storage, adding 4 to 6 cubic foot for each additional person. Also, make sure you have space for your fridge in your kitchen (including opening the door) and enough space to get the fridge into your home.