An infant can (and should) drink around 25 ounces of breast milk every day. I read some pregnancy websites and found that the average lactating C-cup woman can hold around 3.4 ounces at a time per breast. This might not sound like much, but keep in mind women lactate like a river and not like a lake and the whole supply replenishes in around 2 hours.
Now based on Tifa's endowments (estimating around E cup) and the high amount of estrogen she must produce, I'd estimate that each of her breasts can hold around 8 oz. So 16 ounces per feeding. This means she can provide one infant with their share of milk in a feeding session and a half.
In 24 hours (again assuming she's fully drained and replenished of her supply in 2 hours, as is the norm, and that she's overflowing to start) she can produce a whopping 208 ounces of milk. That's enough to fully feed 8 babies. Of course, such a scenario is unrealistic, but even 12 hours lets her feed 4. That's a lot.
Some fun facts about 208 ounces of breast milk:
-It would weigh around 13 pounds all together -It would fill roughly 24 cups -It's incredibly rich in calcium, vitamin A and vitamin B, giving well over 200% DV for each -Drinking that much would account for 206% recommended calorie intake
Additionally, if you were talking in terms of sheer breast volume (as in, her tits entirely filled with milk like balloons), I estimate each could hold 33 ounces, easily enough to feed a baby and then some.
These numbers are a little rough but I feel they paint an accurate enough picture. I hope this helps. Feel free to save this and use it in your own research.
Now based on Tifa's endowments (estimating around E cup) and the high amount of estrogen she must produce, I'd estimate that each of her breasts can hold around 8 oz. So 16 ounces per feeding. This means she can provide one infant with their share of milk in a feeding session and a half. Her breasts would get 30-50% bigger if she was lactating. Though I don't know how much bigger the actual mammary gland would get.
