Get the biggest that your stove (and wallet) will allow. I can't remember how many quarts my pot holds, but I just measured it, and it's 9 inches high and almost 12 inches in diameter. (Anyone know how to convert that into quarts? Math is not my strong suit).
Even at that size, with all the bones and veggies and by the time the stock cooks down enough to jell, I never seem to get that much stock. And I can never make enough. We make lots of soup, add it to virtually every grain dish, most meat dishes, and have it straight up in a mug just because. I keep making up reasons to eat chicken, just so I can get more bones to make stock. It just makes everything taste better.
And if you run out of room in your freezer to keep the stock, you can always buy or borrow a pressure canner to
can your stocks and soups. I'm trying that this weekend.
