Oniss ON8102-L White Women's Swiss Sapphire Ceramic Dia Swiss Quartz Movement High Tec Ceramic Case and Band, Push Button Butterfly Open Clasp Sapphire Crystal, Date Display, MOP Dial, Genuine Diamond Markers, Silver Tone Index Case Size: 39mm Diameter, 11.5mm Thickness Water Resistant - 30M, Screw Down Stainless Steel Caseback