This headband is one size fits most and the size cannot be adjusted. The headband is approximately 6" in circumference, keep in mind that measurement is before it stretches. We feel this is the perfect size for our soft nylon to fit a newborn and stretch comfortably as she grows into childhood. The bow measures approximately 3.5" across. The edges of the headband are raw and are meant to roll. This style is secured with adhesive once tied and is not meant to be untied. The headband material is a soft nylon/spandex blend produced in China. The bow material is cotton or a poly/cotton blend sourced in the USA and overseas. Each headband is hand-sewn and tied by women in our local community. Due to the nature of small-batch production color and sizing can vary slightly.