‘Balconette’ has become a loosely used term, so when you see it you can’t really be sure what you are getting. Some people even use it to describe a shelf bra (cupless) bra. The one thing all ‘balconette’ bras should have in common is that they have quite low cut cups, underwires and quite widely set straps. In saying that I have seen bras described as ‘balconette’ when they are almost full cup. Since the word sounds good in marketing it seems to have been overused to the point where the meaning has mostly been lost.