Specification: Material: Aluminium alloy : Grey, Black, Gold, Rose gold, Silver Waterproof: Yes Thickness: 2mm Diameter: 22cm /8.66"(appr.) Features and high quality. ● Adopting high-gloss process ● Slim body, lightweight and portable ● Round shaped design with smooth surface ● Perfect use in home, office, internet cafe,etc ● Suitable for various brand wired/wireless mouse Notice: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures. a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a