Outer Diameter- 24 Inches, Glass Diameter- 19.5 Inches approx. Material: Metal & Mirror. Working Porthole Opens & Closes. Hidden holes for mounting. The product that we provide to the buyers good in quality and beautifully designed. Are quality check before delivered to the buyers. We use a best quality raw material in the. Manufacturing process, and the product pass through the quality check after every stage. We don’t accept the address change request. Thank you for your understanding. We will try our best to solve any problems. Negative / Neutral feedback doesn’t resolve any problems. We believe the good communication will resolve everything.