As I understand it, you need a digital watch. The most compact model is the DW-5600, but they may seem rustic for a girl. You can choose a brighter color like the DW-5600CS or G-5600B, which are slight. In general, judging by the photos on the web, many girls there wear ordinary DW-6900 but unusual colors. They will be no smaller than the Raisman, but the strap will stick out on any so you can shorten it. If you decide to buy a mechanical watch, I advise you to purchase an additional watch winder box so as not to worry about the constant adjustment of the mechanism. In general, girls can wear any watch.