Hook and Eye Bra Extender Back Closure. Three pack. Make  your bra strap up to 2 band sizes bigger by adding this bra extender. Choose from 4 rows, 3 rows, 2 rows. For bras that are too small in the band add this hook and eye closure bra extender. Works with any back hook and eye closure bra. Pack of 3 has basic colors: white, black, nude. Also available in store.