Generally, you should buy maternity clothes in your pre-pregnancy size. As maternity clothing provides extra room around the belly and bust, it gives you the comfort you need for your changing body. If you're in between sizes or are still unsure of what size to buy, consult our maternity wear sizing chart. Take measurements around the fullest part of your bust, your hips (under your bump), and your bump circumference, and compare these numbers to the sizing chart to find your ideal fit.
The features of a good nursing bra include, additional support for your fuller bust which can be approximately 35% heavier, side support to avoid flattening of the bust which can lead to ligament damage, non-restrictive, a wider set frame to avoid pressure on the milk ducts, cotton lining for comfort and breathability, six hooks and eyes for room to reduce as your rib cage contracts & one hand drop down clips for easy nursing.