I had srs on January 29 and about 2/3 weeks ago I got impression some bras were getting tight but now i know they are so for some reason I'm having a spurt of growth.  I'm pleased but just wondering if they will get TOO BIG! 
I'm on just Estrogel but my hormones levels are very female at about 300E and 7T.
So perhaps there is some effect due to the srs although I had orchie last year so there wasn't any T producers to be removed.

It's normally a rude question, but you threw the subject out there and in order to address your concern I have to ask: exactly how big are your breasts? Are we talking you're still growing and you're a 34 E, or are you floating around in more sane levels of breast size (36 B, 40 C, stuff like that)?

well I use 40B bras but feel the need to go to Cs.

Has your band size gone down? If you've lost muscle mass, that could cause your boobies to appear larger.

If anything this sounds like a good problem.

40 C isn't doing too bad, really. If you feel that you need to up things a cup size, then go ahead and try some bras out. If you can't find any 40 C bras in your area, you could always make one or hit up a tailor.

underboob size is same despite a good amount of dieting so its definitely the boobs that are growing.
curiosly as 40B is now one of most popular sizes of bras in UK the store racks of this size are often empty...same for the 40 sweaters and tops... the store staffs say 'well its beacuse that size is most popular' ...I think they don't understand the supply/demand equation as I often go shopping but have to bring my money home for lack of correct sized stuff to spend it on!