Diameter:1.77''(4.5cm) No Damage, No Headaches - Stop using cheap elastic hair ties. Those hair elastic bands are damaging your hair & leaving nasty hair dents. Gross.You don't have to live with coil hair ties that damage your hair anymore. Our hair coils are gentle on your hair. The smooth plastic, spiral construction helps to prevent tangling and consequently prevents hair breakage when you remove them. Waterproof, Smooth and Hygienic:The spiral hair ties are made of TPU material, non-absorbent and oilproof, they can be worn while swimming or bathing without that “nasty wet hair tie” feeling, and they can be removed from wet hair much more easily than a traditional ponytail holder.The hair ties coils' texture makes it more hygienic than fabric wrapped rubber bands Professional: We are a company dedicated to women's hair accessories for 20 years. We have more than hundreds of styles phone cord hair ties, Scrunchies Hair Bands and so on. Hope we can provide you with the best service and the best quality products. You can contact us with any questions, we guarantee to make you 100% satisfied. Tips: If your coil hair ties for women happen to stretch larger than it's original size, just simply place the phone cord hair ties in warm water or use a hot air blower to shrink it to its original size.