The outside of this head buff is smooth and stretchy with fleece lining to keep you warm in winter. The size is 9 7/8″W x 15 3/8″H, circumference is 31″. It can fit majority of adults. We also provide children size, please contact us if you need. The color of this warm neck gaiter can be customized according to your requirements, custom logo could also be imprinted on it. It is perfect for outings like running, fishing, camping, biking and etc. It is also a great holiday gift for your friends, lover and parents for winter.