It is estimated that 96 million women around the world are wearing the wrong size bra. Many of these women have never been measured to determine their proper bra size. Today, most department stores or women’s specialty lingerie stores will offer this service for free to customers. However, it is just as easy to determine your bra size by yourself at home if you follow a few easy steps.

1. Using a measuring tape, measure the area around your rib cage just below your breasts. For the most accurate results, take off your shirt and bra to measure against your skin. This number indicates your band size.

2. Using the same measuring tape, determine the width at the widest part of your chest. The tape should go around your back and across the center of your breasts.

3. Determine the difference between the two measurements to figure out your cup size. If there is less than 1/2 inch difference, you should wear a size AA bra. A difference of one inch is an A cup size. A difference of two inches indicates a B cup and three inches indicates a C cup in your bra. A difference of four inches is a D cup and five inches is a DD or an E cup.

4. Try on a few different bras in this size to find one that fits comfortably. Close the bra using the middle hook to start, but adjust this as needed if the bra is too loose or too tight. The goal is to find a bra that offers a snug fit but that does not cut into your skin.

5. In order to make sure the cup size fits properly, bend over at the waist while trying on a bra. Your breasts should be contained in the cups of the bra. The fabric between your breasts should also lie flat on your skin.