Description: Dimension: the diameter of the clock insert is 3.15 inch (80 mm), the back diameter 76mm, and the inlaid depth is 18mm. Features: the quartz clock insert features a gold colored trim, metal clock face, and black roman numerals on white dial for easy reading. Great for DIY crafts or replacing old clock faces, clear cover guarantees perfect view reads the time easily and keeps dust away from dial. Classic style: suitable for classroom, office, living room, guest room, meeting rooms, restaurant or any other places. Power: require 1 piece 1.5V AAA battery (not included). Specification: Material: Metal Size Chart: Front Diameter: 80mm/3.15inch Back Diameter: 76mm/2.99inch Mounting Depth: 18mm/0.71inch Package Includes: 1 Piece Clock Insert 1 Piece Rubber Rings Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! 3. Wish you a wonderful on-line shopping!