Our caps are built to fit all women head sizes which are between 21inches to 231/2inches. Apart from our velcro fastening formular, we still leave a little bit of room for expansion at the back and an adjustable front to make sure it fits snugly for smaller heads. We prefer that they are worn on cornrows, naturally packed hair or very light weaves as they are not made to be worn on fuller weaves, wigs and braids.