Expanse BraDescription The Expanse bra is a wire free, low impact bra with adjustable and convertible straps plus a double adjustable band to provide the customization and comfort your body deserves! NOTE: Because the Expanse bra band offers significant adjustability, we are able to utilize the concept of sister sizing for folks who are not a DD DDD cup. If you are smaller, consider sizing down, but set the band sizing larger. If you are larger, consider sizing