This 2 hook Black Bra Extender give you a little extra bandwidth on your regular bras and are a real lifesaver if you gain weight or become pregnant. Prevents bra bands from digging into your back and resulting in visible back fat. Ideal for adjusting your bra to allow it to grow with you, leaving plenty of room for rib cage expansion. Ideal for extending half-size or hard-to-find bra sizes. Hook into the existing hook of your bra and add up to 1.75 inches to your band circumference.