I am a large chested person with an "odd" breast shape. Originally the calculator told me that I am a 40J/K.
I have tried on so many bras, all different types and styles and sizes. VS only ever sized me for what they carried in store so I forced on a 38DDD and said that it will have to do. However it was also so uncomfortable that I went back to wearing sports bras and I have worn that bra maybe twice.
On the hunt for a potential strapless bra, JCPennys only carried up to a 44DD in strapless. I learned that a 40 band fits perfectly, as the calculator said, however I am certainly larger than a DD. While staring at the mirror, I had a thought... Why not take my band size and subtract from the standing rather than the leaning. With this, I decided to step away from strapless and try on the largest cup size i could find in this particular store: a 40G... still a smaller cup than what the calculator said, but I will try it on.
IT FIT. It fit perfectly. I was in awe! I also learned in that moment after browsing this sub some more from the fitting room trying to figure out why it fit so well yet the gore wasn't flesh with sternum that I have tubular breast. I always thought that this shape was only in smaller chests but after looking up examples of large tubular chests, I noticed it looked exactly like mine! (This also is likely why I fit in a G, with the J/K option not account for how much I could push in my chest and such)
The JCPennys bra I was trying on was a full coverage. This subreddit led me to go to a different store (I went to Lane Bryant because it was next door and I knew for a fact that they would carry a 40G) and try on balconette bras. They fit me perfectly with a more flush gore and the wire didn't stab my under arm.
All this to say, thank you ABTF! After about a week of exploring this page and learning about different bras and how shapes of chests can affect sizing, I have finally been able to find a bra that I feel comfortable and CONFIDENT in! I genuinely started crying in the car after buying 2 bras that fit me perfectly because I have been wanting this since for almost 10 years. i truly started to feel hopeless. Thank you, ABTF community. Everyone who has ever posted here has truly changed my life today.