This is an extender bra hook that allows you to adjust the underbust size of your bra. It stretches, so it's comfortable even when you move. This is a convenient item for adjusting the size when your weight or body shape changes. It's economical because you can continue to use your bras even if your size changes. Please use it as an underbust hook or underhook. Quantity: Set of 3 Size: Approximately 10cm wide, 11.5cm high 6-row, 3-column hook Approximately 2cm between the centers of the hooks Colors: White, Black, Skin Tone No discounts offered. This elastic type is available in 2-row, 3-row, 4-row, 5-row, and 6-row options. Please comment if you would like one.