Material: Glass, Diameter: Approximately 7mm to 8mm, Width: Approximately 5mm to 6mm, Hole Diameter: Approximately 2mm to 3mm *Due to the nature of the product, the color may differ slightly from the photo, and there may be variations in size and hole diameter. Please be aware of this. As this is a vintage item, there may be scratches, stains, cracks, and chips. The final judgment should be based on the images. Also, returns are not accepted for discounted items. Thank you for your understanding.