In Japan, nabe can simply mean the social activity of spending time making donabe stew with friends. With a meal as social as this, it’s important to think about how many people you want to make to make food for!
Of course, different meals require different size donabes. A large donabe, like the 5-cup Kamado-san, can make perfect donabe rice for eight people. But if you’re using it to make a donabe hot-pot, the same same size better serves four people (as a rule of thumb, 500ml of volume in a donabe serves about one person). Of course, if you’re planning to have more people, it’s always possible to refill your donabe hot-pot as you go.