I am nursing my second baby so I have tried a lot of nursing bras.  Almost quit a time or two because nursing bras are SO horrible.  Last time I mostly used the medela under wire bras, but I got a lot of clogged milk ducts.  Plus I am really busty and they did not support as well as one would think from an under wire.  With this baby it was a week before I finally put a medela bra on and I ended up with a clogged milk duct.  So I decided to do some research and find the best nursing bra around no matter the price.  I ended up buying this bra and its surprisingly great.  On their website they have directions for measuring to get the right size.  I followed the directions and was on the border of a L and an XL.  I went with the XL because like I said I am busty.  Its pretty good.  A little big around, but I needed the cup size.  I may end up buying L later on when I am not quite so big.  They support pretty good for a nursing bra.  Maybe even better than some of the under wire nursing bras I have.  And they don't cut into my shoulders.  I would recommend this bra.  And especially from Amazon because its a little cheaper than other places.  I would also recommend getting it toward the end of the pregnancy.  My bras were so uncomfortable toward the of the pregnancy and these would have been much more comfortable.