The challenge with bra sizing is that it can vary widely from one brand to another, in part because there aren’t any industry standards for sizing. Knowing your size in one brand will only get you so far. Shopping for maternity and nursing bras is even more complicated. Bodies, breasts, in particular, undergo enormous changes during pregnancy and breastfeeding. Most of these changes are dictated by hormones, which makes it impossible to predict what your bra size will be when your baby arrives. (Many of the women we help with sizing go up at least one to two sizes in the chest band and may go up three to five cup sizes.) Your bra size may continue to change throughout your nursing journey.

Given that all maternity and breastfeeding bras are not created equal, we encourage our customers to measure their underbust and fullest bust before ordering. Even if you've previously ordered the same Momcozy bra, we still encourage measuring again. Depending on where you are in your motherhood journey, your size may have changed since the last time you ordered.

Put on a bra that you feel fits you well. It shouldn’t be overly padded or constrictive. If breastfeeding, measure yourself during the daytime, before a regular feeding, when your breasts are full. If you don’t have a flexible tape measure, you can use any soft, non-stretchy material like a belt, necktie, or string, and then measure that length with a standard tape measure or ruler.

To find your size from your measurements (in inches), begin by measuring your underbust. This is the area directly under your breasts, around your ribcage. The measuring tape should be snug but not tight. Round your underbust measurement to the next whole, even number. This rounded number is your band size. Next, get your fullest bust measurement. Wrap the tape measure around your back and snugly across the fullest part of your breasts.