Circumference: Approximately 20cm (elastic due to rubber) *Please note that there may be slight variations due to amateur measurements. 【Requests】 ・If there are any problems with the delivered product, please contact us before leaving a rating. (We cannot respond after a rating has been given.) ・The color of the product may differ slightly from the photos due to your monitor or the lighting used during photography. ・We will ship in simple packaging. As a result, there may be creases or marks. e917@620