Questions? Leave a comment below! This lot includes two antique vintage door knobs made of porcelain, one in white milk glass and the other in black. Both knobs are round in shape and have a diameter of 2 ¼ inches. These door knobs are perfect for adding a touch of vintage charm to any door. They are original pieces and made of a combination of porcelain and glass materials. They would make great additions to any collection of antique hardware. Feel free to contact me with any questions. Please check out my other items. Thank you for looking!