Material: Glass. Size: Approximately 10mm in length x approximately 11mm in diameter. Hole size is approximately 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. As this is a vintage item, there may be scratches and stains. Please understand this beforehand. Final judgment should be based on the images. Also, returns are not accepted for discounted items.