Inner diameter: approximately 16cm Bead size: approximately 9-10mm *Please note that these measurements are approximate and may have slight variations due to manual measurement. Please understand that the color of the actual product may slightly differ from the images due to lighting conditions during photography. This item is almost unused. As the inspection is done by an amateur, there may be oversights. Please be understanding. Individual perceptions of the product may vary, so please refrain from purchasing if you are concerned about minor details or are overly sensitive. *If you have any questions or would like additional photos, please contact me in the comment section. *Regarding responses to comments and shipping after purchase, I may not be able to respond immediately due to work commitments. Please allow ample time for your purchase.