I recommend being professionally fitted. An ill-fitted bra can damage your breasts and alter your milk supply. We stopped off at myer on the way home from hospital, when bub was 4 days old. My milk supply had only just come in and the maternity bra I had bought previously from target was hopeless in the hospital. I didn't realise I was going to get that big - from a 12B to a 14DD. I bought an elle mcpherson maternity (very comfy). Yes I'll admit expensive, but I rotate between the 2 pairs I have and they dry very quickly. Hope it helps