One size fits most: Diameter 4.72in, length 20.87in, suitable for both adult and teenager. Foldable design makes it easy to carry or store. Adjustable design makes it easy to wear and not easy to slip off. Lining: 100% Polyester Well keeping warm, soft and comfortable. Great knitting & comfortable feeling: beautifully knitted snowflake/deer pattern and fluffy lined trim, soft faux fur make you feel extra cozy and warm, an essential winter accessory for outdoor activities.