Voberry Classic Men's Leather Dial Skeleton Mechanical Sport Army Wrist Watch please note that you need to hand wind the time of the Mechanical Wrist Watch frequently Transparent dial with skeleton design gives you the most fashionable point of view Diameter: 4.1cm(1.6 inch) ; Thickness: 1.3cm(0.5 inch) ; Length of watch band: 18.5cm(7.3 inch) ; Band width: 2.1cm(0.8 inch) Voberry is a registered trademark and the only authorized seller of JLtech1 branded products