The easiest way to make a belly dance bra fit properly is to make one yourself! However, making your own belly dance bra can be very time-consuming if you want something that's heavily bejewelled and embellished. And if you need a matching bra and belt set, you're looking at hours and hours and hours of beading!
Besides, for a belly dance student, you feel you've "arrived" when you buy your first authentic Egyptian bedleh.
Then it arrives, and the bra doesn't fit.
Before you pack it up and return it, be aware that most Egyptian belly dance bras don't fit. We're so used to our modern, scientifically engineered lingerie bras that it's a shock to put on a traditional one. So don't be in a hurry to send it back. First, do some testing to see just how bad it really is.