The Classic Knot appeals to everyone because of its simplicity. It is easy to dress up, or keep casual. It can survive the bottom of a diaper bag like not many other pretty things can.  This headband is one size fits most and the size cannot be adjusted. The headband is sewn at a 6" diameter (12" 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 4" across.