Cerentino Women's RB004 Round Silver Dial Interchangeable Set Silicone Multi-Colored Strap Watch Analog Quartz movement Chronograph design on dial (does not function as a chronograph watch) Case diameter: 39 mm 5 pieces different color interchangeable silicone strap bands that the bands are easy to change by yourself. Band slides out and you can slide new color band in Buckle closure