Elastics Band Assorted 7650.A ponytail holder (also called a hair tie, hair band, hair elastic, wrap around) is an item used to fasten hair, particularly long hair, away from areas such as the face. This is usually done as part of a hairstyle such as pigtails, bunches, or ponytails for straight, wavy and loosely curled hair, and referred to as afro puffs, bunny tails and for highly curled and highly textured natural hair. Thickness : 4mm. Diameter:4.5cm .