During pregnancy, it’s perfectly normal for your breast size to increase, so we recommend measuring your band size at the widest part of your ribcage and adding between 2 and 4 inches depending on your desired fit and unique body. To determine your cup size, measure around the fullest part of your breasts and subtract your band size. Every inch difference between your band and cup measurement is equivalent to a cup size. For example, a 1-inch difference is an A cup, a 2-inch difference is a B cup, a 3-inch difference is a C cup, and so on. Remember that your bra size may continue to change throughout your pregnancy and the postpartum period, so it’s important to regularly check your size and adjust as needed. Our bra size calculator is specially designed to help you determine your ideal size throughout every stage of your pregnancy and postpartum journey.
