I just recieved this bra and I was scared to order a xs-m size because pre pregnancy I was a 34DD and I have no idea what size I am not but at  7 months my size has really gone up. This bra is really adjustable and fits very well. It has a velcro adjustable piece in the back and an extra add on piece in the front if you need it also comes with straps if you need that extra support. Personally I made the back piece smaller and added the extra piece up front with the straps and the openings for the pump are in the right places. I haven't pumped with the bra on yet as I still have 3 months left in my pregnancy but the bra is very comfortable thick and holds the pump in place with great security.