BLK Men's Silver Belt Wristwatch Battery included, ready to use immediately. Color: Ships in black. Green is available for purchase on a separate page. Standard size, ready to wear. Adjustable from approximately 18cm to 22cm. If adjustment is needed, please consult a specialist or use a dedicated tool. Tools can be purchased for around 400-500 yen. Battery is included. Adjust the time by turning the screw at the 15-minute mark back and forth. Push it in to start the watch and the hands will move. Size (approx. cm) Length: 22.0 (dial + belt) Dial: Diameter 4.0, Thickness 1.0 Belt Length: 18.0cm Weight: Approx. 70g