There is no one size fits all answer to this question, as it varies depending on what you are stuffing. Fortunately there are some rules of thumb that can help give you an idea of what size you will need for your kitchen. If you plan on stuffing sausages less than 3/4" in diameter (including breakfast patties) then a model with a 1-3/8" diameter plunger should work well. Look for a machine with removable stuffer tube for more options.