Dial diameter: 4.2cm (personalized diamond big dial)Strap size: 2.0cm * 23.0cmSuitable hand circumference: 14.0cm-19.5cmSmall button on the right of the press watches, watches will light on dark place at night time if you need to see, you can click, it flashed colored lightsWatchband Material: Silicone  Attention: Due to the photograph lights and different computer resolution, there will be a bit off color. Hope for your understanding. If you like our item, please give us five stars. Thank you~~