If you are looking for more of a fashion helper, the bella band or similar bands sold online or at Target, etc. will be great. I have one and I was able to stay in my pre-pregnancy jeans for a lot longer than I have been able to in the past. Also, I am 9 months pregnant now, and at the point where my shirts will not cover the bottom of my belly. No problem. The band sits under the shirt to keep my belly or the jeans panel from showing. It will also help when trying to get back in to my regular jeans after delivery. I saw on the bella band website that some women have used it as a "nursing bra" at night as well-haven't tried that yet, obviously. Now, if you are looking for something to support your belly during pregnancy or after delivery, those are also available at BabiesRUs or other retail stores. They are more of a surgical band and are supposed to be worn under your clothes and you don't want that to show. As I've said, my bella band is awesome and I highly, highly recommend them to pregnant women!!!!
*I got one in white to go with everything. I did have to purchase a medium after I already bought the small. I was right on the line as far as sizing. If you find that as well, go bigger. If it's too small, it will roll and get uncomfortable later on.