When I was about 26 wks I got measured for a maternity bra (M&S). I got some 38B although the cup size was a little large as I thought I'd need room to grow. Well I've had no development. My maternity bras feel just as loose as when I was measured so I was ready to buy the same size in nursing bra. I thought I'd just check the size before buying (Mothercare this time). Well my new size is 36D! I was very sceptical but when I tried on the 36D bra's they fit pretty much the same as the 38B bras that I have...with a little room for breast pads. I'm really surprised! I don't look like a D cup! Are different makes of bra so different?