Yes, a small pun intended with the subject....
Shortly after starting HRT, I've been mostly using sports bras. They're comfortable, and more importantly, keep my nipples from rubbing on anything. Going bra-less just wasn't possible without the smoothest of fabrics... Oh the pain!

Anyway, every week or so I've been checking how well I fill an A cup bra. The plan was, as soon as I could fill one properly, I'd mostly throw the sports bras away and just use normal bras. Understanding that normal bras in an A cup are pretty much all padded, and therefore tend to show my girls off somewhat. Sports bras tend to flatten and hide them somewhat.
Well, today was the day. Tried on my 14A bra... A perfect fit, and filled it fully

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So YAY! A-cup boobs after ~5 months HRT. And YAY, no more hiding them

Of course this does make things slightly more awkward in the office as I still work boy-mode, but I just don't care. And it's only a few months until I'll be Samantha there too.