Bra "sister sizes": how similar are they really?

[MrIllusion]

I was wondering how real those sister-sizes really are. I have two friend who are about the same age and maybe 2 inches apart in height. One typically wears bras that are 36C and the other one 32F. In terms of sister sizes they are only two steps apart, yet the difference is striking. For the first one, her breasts don't really attract attention even when she dresses sexily and for the other one, her breasts are all that we can see!

I understand that two cup sizes is not insignificant, but it looks as different as night and day.

So, how "precise" are those sister sizes equivalencies?

Thanks.

 

[Britva415]

So, how "precise" are those sister sizes equivalencies?

Well for starters, C to F is not two but three sizes apart if we're being precise.

Beyond that, how many cup-sizes apart do you think "breasts [that] don't really attract attention" and "breasts [that] are all that we can see" should be?

I don't really know what your question means. It sounds like you're asking about why the bras are so different but then it also sounds like you're saying the breasts really are that different.

Like, do you imagine that there should be more cup sizes?

One way to answer your question is to point out that across bra manufacturers and even across different models made by the same manufacturer, cup sizes aren't precise at all. The same volume could be labeled as any of three different cup sizes, just depending on who pulled the letter out of their ass the day the sizes for a particular bra model were designed. The same C you're talking about could be a D in another bra or a B in another, and in yet another different bra, the F you're talking about could also be a D - or something else entirely.

There is no standardization and there is in practice a LOT of inconsistency. Sometimes the variation is quite dramatic in magnitude.

 

[MrIllusion]

I know that bra sizes have not been universally standardized.

I was thinking more in terms of "sister sizes". For example, a 32F bra should have the same cup volume as a 36D bra. With this in mind, 36C and 32F are only two sister-sizes apart.

My question wasn't too precise, more of a surprise that two women that are only two cup sizes apart could have breasts that look so dramatically different.

 

[quietinpublic]

It's all about proportion really; a 32F is a very large cup size on a small frame so they will naturally stand out on that person. 36C is a larger band and fairly decent cup size but they won't look as big as they're more in proportion with the body.
I definitely would not say they are anywhere near the same visually, even if they technically aren't too far off in terms of volume.

 

[Britva415]

For example, a 32F bra should have the same cup volume as a 36D bra

OK, well, so, first of all:

"Should?" According to who/what authority? How can you at once agree that there is no standardization while simultaneously claiming this as a standard?

But beyond that:
If this is what you mean by sister sizes, I think you have your answer. The same volume of tit on a 32" chest is going to be very much more noticeable and a very different proportion than on a 36" chest.

I'm not trying to be argumentative, I just think you have two friends with very different bodies, end of story. How did it ever even come about that you know their bra sizes?

 

[Britva415]

Also, which is it? Is she a C or is she a D?

 

[WetSubGirl]

It's all about proportion really; a 32F is a very large cup size on a small frame so they will naturally stand out on that person. 36C is a larger band and fairly decent cup size but they won't look as big as they're more in proportion with the body.
I definitely would not say they are anywhere near the same visually, even if they technically aren't too far off in terms of volume.

It's not a large size at all! It's the same cup volume as 34C which is generally offered at regular stores when 32F is not in stock. And- 34C bra gives a completely different lift and support for the same breast.
I would say, that a gal with 32F bra has been fitted for the right bra size and type and has generally slimmer frame (the number is the ribcage circumference in inches.

 

[quietinpublic]

It's not a large size at all! It's the same cup volume as 34C which is generally offered at regular stores when 32F is not in stock. And- 34C bra gives a completely different lift and support for the same breast.
I would say, that a gal with 32F bra has been fitted for the right bra size and type and has generally slimmer frame (the number is the ribcage circumference in inches.

Cup volume is very different to actual anatomy... and an F is a large cup size, as someone who used to be a 34F knows too well!

 

[WetSubGirl]

I didn't mean to tell it's a small size. 34f and 32f cups differ in volume of the cup.
https://montelleintimates.com/cdn/shop/files/17088_1000x.jpg?v=1721212022 that would be a good example of 32F, which I happen to wear. ;-)

 

[MrIllusion]

I definitely would not say they are anywhere near the same visually, even if they technically aren't too far off in terms of volume.

That's exactly how I understood it "in theory". But when I get to meet these two women at the same time, it's just impossible to consider that their breasts are (roughly, of course) the same volume.

I know we're far from an exact science here, but the concept of sister-sizes just doesn't seem right... Maybe if you just go one step (for example replacing a 34D with a 32E), but beyond that...

"Should?" According to who/what authority?

It's the concept of bra sister-sizes.

How did it ever even come about that you know their bra sizes?

Haha, good question. Some of my stories are "slightly" fictionalized accounts of how I met these two women.