Cerentino Women's RB005 Round Crystal Bezel Interchangeable Set Silicone Multi-Colored Strap Watch Analog Quartz movement Chronograph design on dial (does not function as a chronograph watch) Case diameter: 38 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