This is a leather coaster made from vegetable-tanned leather and tatami edging. The vegetable-tanned leather will develop a beautiful amber color over time with use. We hope you will enjoy using it and experiencing the process of "growing" the leather. The tatami edging part is approximately 7 cm in diameter. Placing glasses larger than 7 cm in diameter on it may cause it to wobble. If water droplets adhere to it and are left unattended, discoloration or deformation may occur. If you are concerned, wiping off the moisture frequently will help keep it looking beautiful. The cup used in the photos is not included. Only the leather coaster is for sale. Size: 9 cm x 9 cm We would appreciate it if those who understand handmade items would consider purchasing. Also, please understand that we generally do not respond to price negotiations or requests for discounts.