This item is made of Japanese horse chestnut wood with a round frame and a handle made of black walnut. This size is compatible with S-size coffee cups from convenience stores and Starbucks. The finish is Cerawood coating. Inner diameter: 6.5cm, Outer diameter: 8cm, Round frame thickness: 8mm. Handle length: 3cm. Do not use in dishwashers, dryers, or microwaves. After hand washing, wipe off the water lightly and air dry. Paper cups sold at 100-yen shops are a bit small, so please purchase the small size. The last photo shows the small size. Please let us know your desired size.