id say when they start looking like breasts, or when your face is fem enough to where it would be socially ackward. Im a few months shy of 2 years, and Im a Large A small B and being as skinny as I am, I couldnt wonder around top less like a man in public at about the 5 month mark. and now its absolutly not allowable as I have slope shape size and bounce. Im dieing for summer to come, I cant wait to wear a bikini top. Tho being pre op I got a bad feeling ill be upset i cant wear a bottom yet. But hey, I like wearing my dark purple 3/4 lenght miller lite swimming trunks and my purple tie dye bikini top. hair pulled back into a pony with my bangs down.
As far is swimwear that covers the chest, underarmor makes swimming tops.