Christa, if you are like me, when you buy bra, you MUZ try, cos, your cup size depends on the cutting on the bra, eg, you sometimes you buy A, and some times B, then you should buy size A for nubra. Reason being, is the nubra pads are too big, then instead of being invisible as it should be, it will show here n there when you wear your gown. If you usually wear same size bras, then just get the same size for nubras.
Ladies interested bulk purchase:
Christa