2 Sizes: This shoulder strap extension comes in 2 sizes, 57mm wide, 262~464mm long with 3 hooks and 37mm wide, 264~468mm long with 2 hooks. The length is adjustable and many sizes are available for you to choose and use. 3 Colours: The bra converter is available in 3 colours, black, beige and white, which can be matched with different colours of clothes. 2 Hooks/3 hooks: 2 hooks and 3 hooks design can be easily hooked with regular bra hook and eye closure, pass the straps through the back and around the waist, the lower the better, hook the straps together with the hook and eye closure in the front. Nylon Material: These bra extensions are made of high quality nylon material, durable, tough and stretchable, comfortable to wear. Suitable: Perfect for backless wedding dresses, party backless dresses, bustier tank tops and everyday low-cut backless outfits.