Thank you for viewing! This is a set of 100 black, knotless hair ties. I bought them but didn't use them, so I'm selling them. Perfect for children in elementary and junior high schools who can only use black, and for adults who want to tie their hair up. Classic black hair ties perfect for everyday use. Diameter: Approximately 4.5cm Ideal for work, school, and sports. Made with hair-friendly material that is less likely to tangle. Comes with multiple ties, convenient for stocking up! It's reassuring to have one in your bag or pouch. They are a little thick and stretch well, so you can use them repeatedly.