DANGER- MUST SILENCE said:
Some women have already stated that it's difficult to find business shirts for the larger-breasted woman.
I'm... skeptical. Now that's a big claim for someone who doesn't shop for women's clothing, but here where I live there are ample opportunities for women of most sizes that exist in the local population to buy shirts that button right up to the collar.
Actually a lot of the time a shirt that's buttoned right up to the collar can emphasise your large breasts
more. Just ask any larger-busted woman who's ever worn a turtleneck - it looks ridiculous.
And in my experience (as someone who
does shop for women's clothing), most of the clothes that would accommodate a large bust also assume that the rest of you is larger too. So a lot of the time, your options are: wear a shirt that fits the rest of you but is tight/gapes at the bust OR wear a shirt that fits your bust but makes you look like you're wearing a tent. Seriously, I used to feel miserable in my school uniform because the shirts that covered my bust made me look several clothes sizes bigger than I was.
Clothes are cut to fit the average body shape at whatever size. If your bust is one size but your body is another, you're screwed. If you want to get a proper fit you have to buy brands that are specifically designed for women with large busts, but they're considerably more expensive and offer less choice than "normal" brands.
Nowadays, I tend to choose to wear shirts that fit the rest of me, but I have to wear a matching vest top underneath to allow for the fact that they're prone to pop open/show cleavage/just not do up at the chest.
[sub]For the record, I wear UK size 8-10 (US 6-8) tops, but have a 30E (US 30DD) chest[/sub]