I literally have never had a bra that fit correctly, and it fucks me up. I've told an employee at VS my size one time (as calculated by ABraThatFits) and the just told me "no it's not" and then could not find me anything that fit.
Thing is: my boobs aren't even that big?? Apparently it's a ratio thing that makes it so difficult to find?? Band size is 30/32, cup size is DDD/E. I don't want to risk ordering online and wasting money (I want to try it on!), so I'm stuck with terrible & uncomfortable fits.
Yeah, my spouse learned the hard way to ignore bra shop employees - around here, all the bras are on the floor so its easy enough to find the size you need (if it exists) without help.
That being said, once you get to E cup and higher, you are better off dealing with online retailers with good return policies.
Hey! So I actually have near the exact problem you do (30G), and I just wanted to recommend three brands that actively work for me, Natori and Chantelle! I like their unlined molded bras- they work wonders for me! Tiny band and big boob is such a pain in the ass (especially if they're lopsided)! I'm also fond of Change Bras if you're in Canada or in Europe. I tried them on at Dillard's (or Change bras when I visit Canada) and bought them second hand on depop or eBay. Tho if you're happy with funky designs you can get very lucky with clearance at places like dillards (found a bra for $10 -it's purple and orange and it's my favorite)! Amazon also has a decent try before you buy policy too. Good luck ✨
For me it's the shape rather than the size. I mean, the size too, but I'm happy with sister sizes. It's just that i always get spilling at the side and gaps in the middle. I've given up on molded cups altogether.