Thank you for viewing. My wrist is about 18cm, and it feels a little loose. The watch itself is included only. Solar charging, radio wave reception, and Japanese time have been confirmed. -------------------------------------------------- 【Functions/Specifications】 ● Model Number: GST-W100D ● Material: Resin/Stainless Steel ● Band: Genuine SS band, three-fold clasp ● Tough Solar ● Radio wave reception function (Multi Band 6) ● 20-bar water resistance ● Hand retracting function ● World time ● Stopwatch ● Timer ● 5 daily alarms, hourly time signal ● Power saving function ● Full auto-calendar ● Double LED light (bright)