I read an article about the bra industry some time ago. I don’t recall the details, but suffice it to say that the methods/“rules” they use to determine cup size/shape for different bras in pretty wonky, to say the least.
The only thing you can do is the same as every other woman, just buy bras and wear them/try them on and put them in the back of your underwear drawer when they are 'not quite right’…or go through the hassle of returning them,(rarely an option, because you have to wear it to find out if it fits!arggh!).(You can also do what I do and just toss it in the bin).
When you find a bra that fits properly, be sure to note the size, manufacturer, and model. The size will definitely not be the same fit among other brands. It never is.
Sizes in women’s clothing and undergarments, vary wildly. It’s just a fact of life.
This is my experience, after 28 years of being a trans-woman.
I invite anyone else to add to, or detract from, my statement. I’m always grateful to learn anything that can help 🆘.
Good luck honey.
Update: a day later and I’m just sitting here, watching PBS, in panties and fuzzy slippers. It occurs to me that, when it comes to panties, sizes are usually pretty standard, at least with North American manufacturers/brands. Of course the best ones stretch at least a bit, but I’ve worn a seven for years and still do.(it’s only my waist that has grown with the years). 😏
--weezi-- 💜🙏🏼🦄
--weezi--💖🙏🏼💜🙏🏼🦄🥳🎉