A well-fitting bra will have the following features: The band of the bra is level all the way around your body Your breasts fill the cup without spilling over The straps should stay on your shoulders without digging in The center of the bra lays flat against your chest between your breasts Signs your bra is too big: Your breasts don’t fill the cups You don’t feel secure or supported Your straps fall off your shoulders Signs your bra is too small: Your breasts spill out over the cups You can feel underwire pinching your skin You see red marks on your skin after you take your bra off