excellent replacement strap for that g shock look, saw this item at kmart for nine bucks, and at several kiosks at the mall for double that. it is exactly 19 mm wide around the wrist and exactly 25mm wide where it meets the watch case, and yes it hooks up to a 16mm clasp. looks and feels great, doesn't make my skin sweat like other imitation straps, this one is better in quality than it's nyc china town counterparts. it fits my casio WL500 tough solar perfectly since i thought the strap it comes with was way to thin and preferred the wide strap look. would buy again, oh and the clasp was not silver like in the picture it was black which i prefer and was happy about since my watch didn't have any silver on it.