Diameter: Approximately 1 cm [Material]: Elastic rubber band. Metal-free elastic hair ties. These stretchy hair ties stretch easily. They hold hair firmly and are not easy to loosen, break, or stretch out. Easy to put on and take off, and they don't get in the way. Helps you quickly create an elegant ponytail. [Comfort]: No damage to hair. Soft and firm seamless design. Doesn't stick to hair and can be easily removed from the head. Will not harm you or your baby's hair. [Wide range of uses]: Perfect for small dreadlocks, hair designs, braids, ponytails, wedding hairstyles, and DIY more attractive hairstyles. Easy to store in the office, at home, or in your bag. #aisshop #21-15