No. 13 Material: Natural Stone Bead size: Approximately 6.5mm Inner circumference: Approximately 14.8cm Please note that natural stones may have cracks, chips, dents, inclusions, and variations in color, shape, and size. Please understand that the photos may differ slightly in color from the actual product due to screen and environmental factors. Size may have an error of ±0.5mm. Please understand that there may be some errors due to amateur measurements. Thank you. Items will be shipped in simple packaging.