I have the 6 litre, it will make a pot of stew that will feed 4 adults, using 500g minced steak, 2 onions, 3 carrots and 1.5kg of potatoes, that nearly fills the pot. It will take a chicken but my old slow cooker was oval and a better shape for a whole chicken, this is round although still takes it. It will hold a huge amount of curry or chilli so I'd say it will be fine for a family of four.