These headbands are sized for preemies and small newborns up to 10 lbs. The headband is sewn at a 5" diameter (10" circumference), keep in mind that measurement is before it stretches. The bow measures approximately 3" across. The exposed stitching detail and a raw edge is signature Baby Bling! This style is sewn in two pieces and can be taken apart for hand washing or to mix-and-match. The Itty Bitty Knot material is a soft nylon, produced to our specifications, in the USA. 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.