This headband is one size fits most and the size cannot be adjusted. The headband is sewn at a 7" diameter (14" circumference), keep in mind that measurement is before it stretches. We feel this is the perfect size for our soft material to fit a newborn and stretch comfortably as she grows into childhood. The printed material is a soft nylon/spandex blend produced in China. Each headband is hand sewn by women in our local community. Due to the nature of small-batch production color and sizing can vary slightly.