Women's 3-Hook 3-Row Elastic Bra Shoulder Strap Extension Buckle Bra Strap, Bra Extension Buckle The length of the bra hook strap is 1.96 inches/5 centimeters by 2.16 inches/5.5 centimeters, with a distance of 0.75 inches/1.9 centimeters between the two hooks. There are four colors to choose from: black, white, red, and skin tone. There are 5 pieces that are 3 hooks and 3 rows of bra extension straps Skin friendly cotton and nylon materials made of metal stainless steel, with moderate thickness, comfortable to wear, and easy to clean. Easy to use, connect the bottom hook of the extender to the bra hook and loop.