(Closed) Ok, someone please explain bras and boobies to me

posted 6 years ago in Accessories
Post # 3
Member
3078 posts
Sugar bee
  • Wedding: October 2012

@MissFireFlower:  I’m no help. I have no idea.  The last time I went in to Victoria’s Secret they started going on an on about sister sizes and I just left.  Like, the girl was in the middle of her sentence and I just turned and walked out the door.  She had been rambling about it for 10 minutes and I was just done.  My brain was friend.  I probably came off as really rude, but SERIOUSLY!  Just give me a freaking bra that fits and let me leave!!

Post # 4
Member
619 posts
Busy bee
  • Wedding: November 2013

@MissFireFlower:  I think it has something to do with the band size. I was measured at a 42Dirty Delete, but when I bought a strapless bra she suggested a 40E to give that extra support without the straps.

Post # 5
Member
2226 posts
Buzzing bee
  • Wedding: January 2012

Cup sizes are relative to your ribcage. So you measure your underbust, then the widest part of your chest. You subtract one from the other to give you your cup size. Sister sizes are the same size breast but different width ribcage.

Post # 8
Member
506 posts
Busy bee
  • Wedding: November 2013

@MissFireFlower:  my Fiance was a manager at VS and he explained it as sister sizes are a last resort. They can work for you if nothing else is available but it won’t be the best fit.. Or something like that lmao! I just send him to get my bras in the right size!

Post # 9
Member
279 posts
Helper bee

@MissFireFlower:  To my understanding of sister sizes, a 38B, 36C and 34D all have the same size of cups, but they have different sized bands. So if you’re a 36C then the 34D cups would fit your breasts, but the band would be a bit too small. So if the store doesn’t have a 36C in stock they might try to get you to buy a 34D and add a bra extender to get those extra 2 inches to fit your back and ribcage. Or you might be able to wear a 38B on the tightest hook if you usually wear a 36C on the largest hook. But it is better to get your actual size if possible.

Post # 11
Member
128 posts
Blushing bee
  • Wedding: May 2013

Yeah, its all about the band size.  A 36C’s sister size would be 34D or 38B.  Same volume in the cups, but the way the cups are sewn would be different due to the band size.  A 38B’s cup would be sewn flatter than a 36C because the boobs are spread out more due to the larger ribcage.  A 34D’s cup may seem larger, but its just shaped so that the apex comes out more.

Since bra designers do not use identical patterns or fabric, you may have to depend on a sister size if something doesn’t fit properly.  For example, a microfiber bra with foam may not stretch as well as a cotton or lace paneled bra so you have to play around with band sizes.

 

To me, bra sizing is a mess for me.  Proper measurements say that I’m a 30C, but I’m wearing a 32Dirty Delete right now thanks to trial and error.  30C makes me feel like a teenager trying to impress stupid boys by having my boobs smushed all over.  :

Post # 12
Member
358 posts
Helper bee
  • Wedding: November 2013

Your cup size is based on the ratio of your bust to your chest.  “Sister sizes” probably refer to sizes that have the same volume of cup.  I’ll just cp a post I wrote the other day:

While a 32Dirty Delete, 34D, 36C, … etc may have the same volume cups, they are *not* the same.  A 38B cup will be much wider and shallower than a 32Dirty Delete.  I.E. if you imagine each cup as a section sliced from a sphere, a 32Dirty Delete would be a large portion of a small sphere vs a 38B which would be a smaller slice of a larger sphere.  Same volume, different shape.

Depending on the shape of your breasts, you may be able to play with the cup sizing and adjust the band, but it’s not as flexible as one would think.

Measuring your bust and chest will give you a place to start in determining your bra size, but it also depends on the shape of your breasts.  For example, if they are wide and flat, you may be better off in a smaller cup with a bigger band, and then adjusting the band to fit your size.  I am a 28GG.  When I was a younger (and smaller) I used to buy 34DD’s (Which was the “sister size” to my actual size, and the only thing I could find that remotely fit me).  The band was way too loose, and they squished my boobs against my chest so they were always falling out.

Bra sizing seems arbitrary, but there is actually a science to it. 😀

Post # 13
Member
1090 posts
Bumble bee
  • Wedding: May 2014

@MissFireFlower:  Cup size and bandsize are to be considered together. As someone said above, sister sizing is to be used as a last resort. You (meaning everyone) should be wearing the best band size for you because most of the support comes from a band. If you are wearing a band that’s too large for you, you should use a rixie clip to get the proper support

@Junip3r:  +100 to all of this

A few blog posts on how cup and band sizes really work

A Sophisticated Pair

Fuller Figure Fuller Bust

Post # 14
Member
10588 posts
Sugar Beekeeper
  • Wedding: January 2011

I wouldn’t be able to fit my sister’s bra, and have no intent of buying a sister size!  If it’s a size that’s difficult to find that’s one thing.  It sounds like this is used by stores that don’t carry much stock or just don’t carry a typical variety of sizes.

Post # 15
Member
1805 posts
Buzzing bee
  • Wedding: March 2013

All my life I had worn a 34b.. It was good enough but not perfect, I got measured and she told me my true size was 32c  but that 34b was a sister size. They don’t always carry 32c so I guess that where the sister size comes in? Confusing lol

Post # 16
Member
1157 posts
Bumble bee
  • Wedding: May 2014

@MissFireFlower:  LMAO!!  I hate shopping for my boobs!!  I get so freaking irriated everytime.  Sister sizes….never heard this explained to me before.  But if definitely explains why my boobs are always different sizes everywhere I go!!

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