>>56136294Me too.
But as a lorefag, when I sit down and try to do some actual worldbuilding for stuff like this I tend to get stuck on what an A and Z cup would actually be. Like, IRL, the E-G range (for a a girl that's not fat) is already in the realm of noticeability and you're just in the first few letters. Something like a 34J is definitely in the range of, "I saw this girl with some huge boobs today," and her having to shop at specialty stores but you're not even halfway through the alphabet (this conversation is of course confounded by different countries having different bra sizing standards but whatever I'm just going by US). And a real life Z-cup would actually be pretty gigantic and is mostly just used as a porn marketing term.
So you have not just the problem of setting a "minimum" with what you declare an A-cup is but you also have to decide where you're putting the average, and generally people want to represent a large range of sizes in this type of setting. The average IRL is like a C or a D, so if your fantasy A-cup was, say, a real E-cup, and your fantasy D-cup was a real T-cup, then this would greatly expand the range of sizes you're representing (and probably make a Z-cup outstandingly massive). But now there's another problem: basically no one would have a bra that actually fits snugly, which is even more important with such gigantic breasts, because each size is so different from the next one up or down. Even assuming no one ever experiences pain due to the immense weight of their titmeat, you still have to keep them contained properly (and if we assume everyone has super perfect, perky breasts that don't need a bra then, well, they wouldn't have invented bras in this world, would they?).
Really my assumption is that in a world with such a large range, sizes would just be declared as underbust and bust, like how pants are sold by waist and length.
