This unit was purchased some years back from a business I can''t recall. But she made this unit for me. It''s 24 inches but really 26. It can be worn straight or curled. This cap is more on the large size, so if you have a medium large head, then it''s for you. Medium can work, but you will need a band and combs like me. There are combs, but the elastic band was cut off as it got old. This is 100% human hair, and she doubled her weft before she hand sewn it.